October 2009 Archives

Erik Lemieux Chimera 2

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P1010024.JPG I found this plant outside of Alderman Hall on the St. Paul campus. It seems to me that the mutation has occurred in the LI layer because the lack of chlorophyll is around the edges.

Mutant plants

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LIIIChimera2_MC.jpg

This provides a nice example of an LIII mutation.  Because there is an excess of red pigmentation the leaves appear pinkish.  The mutation is visible in the center of the leaves as a lighter pink color.  This is because this portion of the leaf is lacking chlorophyll so only the red pigment is visible.


LIChimera_MC.jpg


This spider plant shows us an example of an LI mutation.  You can see the areas lacking pigment are on the very edges of the leaves.

Erik Lemieux Chimera 1

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P1010021.JPG This is a picture of an ornamental plant that I found in the classroom of our lab in the Plant Growth Facility. I believe it's called Peperomia scandens and it looks like the mutation is in the LI and LIII layers.

Adam's Chimeras 2

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Adam's Chimeras 1

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Stephanie's Chimeras 2

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Stephanie's Chimeras 1

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Chan_Chimeras

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Chimera 1

I found this plant in front of Murphy hall.  I don't know the name of this plant (nothing new)
But this plant has a mutation in L-II and L-III layer.


Chimera

This plant was found in the building right in front of Coffman called the cube.  I also do not know what type of plant this is.  But as you can see, it seems like it has all the mutation in L-I, L-II, and L-III layers.

Heidi Chimera 2

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H Erm Varigation 2.jpg

Heidi Chimera 1

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H Erm Varigation 1.jpg

Chimeras #2-Nathan

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This picture was taken at my parents house in CLoquet, MN. It looks like the mutation is in the  L-II layer.

 

chimeras 2-nathan

Chimeras #1-Nathan

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This picutre was taken in my family home in Cloquet, MN. It shows what looks like mutation in the L-III layer and maybe some in the L-II layer as well.

 

Chimeras nathan

The Chimeras 2 by Ningxiao Cao

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26102009305.jpgI found this plant in front of Lind Hal. Because the white part most are on the edge of the plant. So I think the chimeras are the result of an LII mutation.

The Chimeras by Ningxiao Cao

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I found this plant in Coffman Union. Because of the white part most are on the side of the plant. This is a monocot chimaral mutations.L-I chlorophyll mutation in monocots exhibits as leaf margin strip chlorosis.

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I also found this leaf in my front yard. This leaf also has a LII mutation, as once again you can see the white (mutation) occurs only around the edge of the leaf.


leaf variegation2 by Amy Scherer.jpg

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I found this plant in my front yard. I also think the chimera is a result of LII since the white occurs only around the edges of the leaf
leaf variegation1 by Amy Scherer.jpg

Chimeras by Jielin

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I found this plant at my friend's apartment. Its the result of L-III mutation.

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This is another plant from my friend's apartment. It is the result of L-I and L-II mutation.

 

 

 

couple of chimeras

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variegated jbo 2.JPG
This first sample is taken from the landscaping demo garden on the st. paul campus.  As far as I can tell, it's an LII mutation, to be sure I'd have to do a cross section of the leaf to determine if the vascular tissue is lacking pigment.  So, I'd say it's a GWG.

variegated jbo 1.JPG

The second sample is from the north side of Borlaug Hall, also a LII mutation, but this is a WGG.

Chimera2 - David

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dumb.JPG I found this on the St. Paul Campus, outside the student center. This also appears to be an L-II mutation.

Chimera1 - David

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assignments.JPG I found this inside my apartment building by the elevator. It appears to be and L-II mutation. It may be L-I however. It's hard for me to tell.

Matt. P Chimera Plant

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IMG_1015.JPG

This leaf is from one of my house plants.Their is discoloration throughout the whole leaf resulting from mutation in both the L-I layer and the L-II layer.

Chimeras by Reng

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CIMG4054.jpg
  I found this plant just outside my apartment. I guess it's an Llll~
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  This one I found outside Carlson School of Management. I think it is an Lll.

Matt P. chimera plant

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IMG_1014.JPG

This leaf is from one of the chimera plants my mom owns. Cells in the center of the leaf lack chlorophyll resulting in a white color. This is due to a cells mutation in the L-III layer(corpus). 

variegation2 from Bingqin

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I found these leaves in the front of U Common, and I think this is the result of both L-II and L-III mutation.

Variegation from Bingqin

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I found these leaves beside the frontdoor of Melrose, and I think this the result of L-III mutaion.

week 7-ms

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This plant found outside of my house has L-I and L-II mutation.

week 6 picture one ms.jpg

 

This monocot also found outside of my house has L-I and it appears L-III also.

week 6 picture 2 ms.jpg  

 

Chimeras at my house

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This is my ficus plant, its pretty old and the variegation has changed over time from all white and green to different shades of green and solid green leaves. This is LII & LII chimeras GWG
ficus_mls.jpg
This is a new houseplant that I acquired at the Magrath Library this semester. It is a cutting from one of the library plants. The chimera could be LIII GGW, but I wonder if this is a mosaic design caused by a virus?
houseplant_mls.jpg
c

Abby's Chimeras

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Abby's Chimera 1.jpg

 

Abby's Chimera 3.jpg

These top two pictures from the same plant seem to be exhibiting L-ll and L-lll variagation and I'm not sure actually if they exhibit L-l as well since there is not a clear outline but rather just the entire L-ll and L-l regions are lacking pigment. 

Abby's Chimera 2.jpg

This chimera is showing L-lll mutation. It is also interesting how you can see the hair-like structures on the leaves. I wonder if this is also a sign of mutation.

Variegation 2- MM

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I'm not sure if this mutation is LII, LIII, or both.The lack of pigment is pretty spotty, so it is hard to tell what area is being affected.

 

Variegation2.jpg

Leaf Variegation-MM

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This is an example of LII mutation. The outside part shows a lack of pigmentation and since the epidermis doesn't show color mutations, it has to be a LII mutation. Variegation1.JPG

Boies' Hosta

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Hosta.JPG

Boies' Bruneria

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Bruneria.JPG

Variegation around the house

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In my picture this week, there is a bit of a red tint that I could not get rid of - my apologies in advance!

Here is my first example, I believe this would be an L-I mutation because the leaf surface lacking in chlorophyll is only on the outside edge of the leaf.  (This could also be an example of L-III mutation because of the slight mottling throughout the leaf, although because the second leaf beneath my example does not show this, I will stick to L-I as my guess...)

ss wk7 pic 4.jpg


Here is an example of an L-III mutation.  This leaf is mostly lacking chlorophyll along the vascular structures, but this deficiency also presents itself in a more subdued way throughout the leaf.

ss wk 7 pic 3.jpg 

Variegation Chimeras - Sara C.

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IMG_2682.JPG
This picture shows spotted pigment loss mutation. I believe this to be mainly LII but possibly LIII in some cases as it nears the center and LI as it runs off the end of the leaf.

IMG_2677.JPG
This species has a combination of LI and LII mutations. This mutation is prominent in that you can clearly see that the edges have lost full color pigmentation.

Heidi's reluctant post

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Heidi tried to post earlier, but the file wouldn't stick.  Let's see if it does now:

Heidi stages of cell cycle.jpg

G1 Interphase. Nuclear membrane holds relaxed chromosomes together.
Prophase. Chromatin coils and condenses = chromosomes. Form sister chromatids. Nucleus expands. Spindles on to scene.
Metaphase. Spindles attach to chromosomes at centromeres.
Anaphase. Chromosomes separate, each sister chromatids to one pole. Spindle fibers shorten.
Telophase. Nuclear membrane forms around each set of chromosomes. Chromosomes relax. Cell plant forms in between.

Emily's Mitosis (telophase)

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DSCN2609.JPG

This is the stage of mitosis called telophase. This is where the spindle fibers start to disapear and the nuclear membrane starts to from around the chromosomes. and the new cell wall plate starts to seperate the 2 parts of chromosomes.

Emily's Mitosis (anaphase)

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This is the stage of mitosis called anaphase. This is where the spindle fibers pull apart the chromosomes.

Emily's Mitosis (metaphase)

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This is the stage of mitosis called Metaphase. This is where the chromosomes (good and plentys) line up in the middle because of the spindle fibers.

 

Emily's Mitosis (prophase)

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This is the stage of mitosis called prophase. This is where the nuclear membrane disapears(the popcorn) and the spindle fibers start to form tooth picks)

Emily's Mitosis (interphase)

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DSCN2605.JPG

 

this is the stage of mitosis called interphase.

Therese Graf- Mitosis Simulation

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DSCN6240.JPGDSCN6250.JPGDSCN6245.JPG
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Sorry my pics are not in order. I had a hard time having them show up clearly pixel wise, so they were uploaded in random order. But the first stage the G1 interphase stage, is where the chromosome are relaxed. The chromosome are held together by the nuclear membrane. The next stage, prophase, is where the chromatids begin to coil to form chromosomes and the nuclear membrane  begins to disappear. The chromosomes spread out to fill the cell and the spindle apparatus begins to form. In the metaphase the spindles grow and the chromosomes move to the metaphase plate and are at their most condensed state. Then during anaphase the chromosomes split and migrate to the polar regions of the cell.The spindle fibers shorten. Finally, is the telophase where a nuclear membrane once again forms around the daughter cells and the cell wall begins to separate. The chromatids become relaxed again cytokinesis occurs.

Bingqin's Telophase

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The stage above is Telophase. In this stage,the nuclear membrance forms around both of the daugter cells. 

Bingqin's Anaphase

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The stage above is Anaphase. In this stage, chromosomes are devided into sister tomatids.

Bingqin's Metaphase

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The stage above is Metaphase. In this stage, spindle grows quickly and attach to the chromosomes at the centromeres. And the point of attachment is called the kinetochore. 

Bingqin's Prophase

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2009-10-19 23.43.37.jpg

The stage above is Prophase. In prophase, chromatin begin to form chromosome. And each chromosme have two strands.  

Bingqin's Interphase and G1

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2009-10-19 23.40.08.jpg

In the picture above is the stage of interhase.During interphase, the chromosomes are relaxed.

Stages of Mitosis - Telophase

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Telophase - In this stage the nuclear membrane forms around each new set of chromosomes. Cytokenisis takes place, forming a new cell wall between the two daughter cells. the chromosomes go back to their relaxed state and enter interphase again.
telophase_mls.jpg

Stages of Mitosis - Anaphase

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Anaphase - this is when the spindles retreat to opposite poles of the cell, pulling the centromeres apart, separating the sister chromotids to the opposite poles.
anaphase_mls.jpg

Stages of Mitosis - Metaphase

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Metaphase - during metaphase the sister chromatids align themselves along a "plate" in the cell they become attached to the spindles at the kinetochore. The chromosomes are at their most condensed state during metaphase.


metaphase_mls.jpg

Stages of Mitosis - Prophase

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Prophase - during prophase the chromosomes condense to form sister chromotids, the nuclear membrane starts to disappear and spindle apparatus (tooth picks) begin to form.
prophase_mls.jpg

Erik Lemieux-Telophase

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P1010016gh.JPG Nuclear membrane forms around chromosomes in each of the daughter cells and cell plate forms. Chromosomes decondense and relax.

Erik Lemieux-Anaphase

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P1010013.JPG The chromosomes begin to separate as the spindle fibers shorten. The sister chromatids are drawn to the opposite poles of the cell.

Stages of Mitosis - Interphase

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G1 Interphase... this is when the chromosomes(clay) are relaxed and are undergoing replication. The chromosomes are grouped together inside the nuclear membrane (paper clips)
interphase_mls.jpg

Erik Lemieux-Metaphase

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P1010012.JPG The spindle grows and forms attachments to the chromosomes as they move to an imaginary equatorial plate (metaphase plate).

Erik Lemieux-Prophase

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P1010011.JPG The chromatin condense to form chromosomes and the spindle apparatus (Q-tips) begins to appear.

Erik Lemieux-Interphase

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P1010020.JPG The chromosomes (paperclips) are held together like a blob in the nuclear membrane (lanyard) in a "relaxed" state.

Chan_Stages_of_Mitosis

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G1-Interphase.JPGDuring Interphase the chromosomes are relaxed, and during the S phase of interphase each chromosome replicates.  The two identical copies are called sister chromatids and they are held together at a site called centromere.

Prophase.JPGIn prophase the chromatin begins to coil and condense to form chromosomes.  The nuclear membrane begins to disappear and the chromosomes spread out to fill much of the cell.

Metaphase.JPGThe spindle grows and forms attachments to the chromosomes at the centromere.  This point of attachment is called kintochore.  Chromosomes move to an imaginary equatorial plate.

Anaphase.JPGThe spindle fibers shorten and the sister chromatids are drawn to opposite poles of the cell.

Telophase.JPG
The nuclear membrane forms around the chromosomes in each of the daughter cells, a cell plate forms between the two daughter cells and cell walls separate the newly formed cells in a process called Cytokenisis.

Jielin Liu's Lucky Charms mitosis

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DSC05273.JPG

Interphase: After chromosome replication, each chromosome is composed of two sister chromatids. Centrosomes have replicated.

DSC05275.JPG

Prophase: Chromosomes condenses, and mitotic spindle begins to form. During prophase, the mitotic spindles begin moving to opposite sides of the cell, or they form on opposite sites.

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Metaphase: chromosomes complete migration to the middle of cell. At this point, the formation of the mitotic spindle is complete. Each chromosome is held by kinetochore spindle fibers reaching to opposite poles and exerting the same amount of tension or pull. A tug of war is occuring, with kinetochore spindle fibers pulling each chromosome in opposite directions.

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Anaphase: Sister chromatids separte. Chromosomes are pulled to opposite poles of the cell. The kinetochore spindle fibers then begin to shorten. The two poles of the cell are also pushed away from each other by motor proteins associated with microtubules that are not attached to chromosomes. During anaphase, replicated chromosomes splite into two identical sets of unreplicated chromosomes.

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Telophase: The nuclear envelope re-forms, and the spindle appartus disintegrates, and the chromosomes begin to de-condense. Once two independent nuclei formed, mitosis is complete. During cytokinesis, the cytoplasm divides to form two daugter cells, each with its own nucleus and complete set of organelles.

 

Nathan's Telophase

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The membranes return (headphones), while the chromosomes become the relaxed chromatins. In the middle a cell plate forms in a process called Cytokinesis.

nathans telophase.

Nathan's Anaphase

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The chromosomes seperate at the centromeres and the sister chromatids head to opposite poles. The spindles also begin to shorten.

nathans anaphase

Nathan's Metaphase

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The spindles grow and attach to the chromosomes at the centromeres. This attachmment is called kinetocore. The chromosomes move to the metaphase plate in between the polar sides. The chromosomes are at its most condensed state.

nathans metaphase

Nathan's Prophase

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This picutre shows the chromosomes condensing joining each sister chromatids by the centromere. The nucleus membrane begins to disappear in this phase. The spindles (blue gum) begin to appear.

nathans prophase

Nathan's G1 and Interphase

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The headphones surrounding the blob of chromosomes (blue pens) represents the nucleus.

nathans g1

Abby's Bathroom Mitosis

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Abby's G1 Interphase.jpg

This is G1 Interphase. The cotton balls are the chromosomes and the are held together like a blob within the nuclear membrane. These chromosomes are relaxed.

Abby's Prophase.jpg

Here is Prophase. The chromatin is beginning to coil and condense to form chromosomes. You can begin to notice two strands (sister chromatids) and that these sister chromatids are attached to each other at a centromere. Also, spindle apparatus begin to appear.

Abby's Metaphase.jpg

Here in Metaphase, the spindle grows and forms attachments to the chromosomes at the centromeres. This point of attachment is called the kinetochore.

Abby's Anaphase.jpg

In Anaphase, the chromosomes separate and the centromeres divide so that one of the sister chromatids migrates to one pole, and the other sister chromatid migrates to the opposite pole. Spindle fibers also shorten.

Abby's Telaphase.jpg

Here, in telephase, the nuclear membrane forms around the chromosomes in each of the daughter cells, a cell plate forms between the two daughter cells and cell walls separate the newly formed cells in a process called Cytokinesis.

Telophase by Amy Scherer

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In the telophase stage the nuclear membrane forms around the chromosomes in each of the daughter cells, a cell plate forms between the two daughter cells and cell walls separate the newly formed cells in a process called cytokinesis and the chromosomes once again become relaxed.
telophase by Amy Scherer.jpg

Anaphase by Amy Scherer

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Anaphase by Amy Scherer.jpgDuring Anaphase the chromosomes separate. The spindle fibers shorten and the sister chromatids are drawn to opposite poles of the cell.

Metaphase by Amy Scherer

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During this stage the spindle grows and forms attachments to the chromosomes at the centromeres. Chromosomes are in their most condensed state.metaphase by Amy Scherer.jpg

Prophase by Amy Scherer

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prophase by Amy Scherer.jpg
sIn Prophase the chromatin begins to coil and condense to form chromosomes. The chromosome appears to have two strands called sister chromatids which are attached at a centromere. In prophase the nuclear membrane disappears and the chromosomes spread out to fill up much of the cell. It is in this phase that the spindle apparatus begins to appear which are associated with movement of the chromosomes during division.

Interphase By Amy Scherer

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interphase by Amy Scherer.jpgDuring the G1-Interphase stage, chromosomes are relaxed within the nuclear membrane.

Telophase by Ningxiao Cao

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telophase.jpgTelophase by Ningxiao Cao

Anaphase by Ningxiao Cao

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anaphase.jpgAnaphase by Ningxiao Cao

metaphase by NIngxiao Cao

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metaphase.jpgmetaphase by NIngxiao Cao

Prophase by Ningxiao Cao

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prophase.jpgProphase by Ningxiao Cao

G1 interphase by Ningxiao Cao

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g1interphase.jpg
G1 interphase by Ningxiao Cao

G1-MM

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G1 stage is a growth stage. You can see the nucleus in the center of the cell.

G1.jpg

Telophase-MM

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Telophase.jpgTelophase is the stage where the nuclear membrane reforms around the seperated chromatids.

Anaphase-MM

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During anaphase the sister chromatids seperate and move to either the top or the bottom of the cell.

Anaphase.jpg

Metaphase-MM

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During metaphase, the chromosomes line up in the middle of the cell.

Metaphase.jpg

Prophase-MM

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In prophase the chromosomes start to condense and form. Also the nuclear membrane starts to spread out, and spindles start to appear. Prophase.jpg

Interphase- MM

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During interphase, the chromosomes are relaxed.

Interphase.jpg

Boies' Mitotis - Prophase

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Prophase.jpg

Boies' Mitotis - Telophase

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Telophase.jpg

Boies' Mitotis - Interphase - G1

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interphase copy.jpg
This picture shows the interphase stage of cell mitosis.  This is the stage where the chromosomes (seen here as clipped pink and blue zip ties) are relaxed and have not yet begun to condense.

ss101909Interphase.jpg


This picture shows the prophase stage of mitosis.  This is where the chromatins begin to condense in preparation for division and the spindles (toothpicks) begin to appear. 

ss101909Prophase.jpg



This is the metaphase stage of mitosis, where the chromosomes are now attached to the spindles and the have assembled at the center of the cell. 

ss101909Metaphase.jpg


This is the anaphase of mitosis, where the chromosomes have split and now are being pulled by the spindles towards either end of the cell. 

ss101909Anaphase.jpg


This picture is the telophase stage of mitosis, where the chromosomes have now separated and become separate cells.  The nuclear membrane has formed around the newly formed cells, but the spindles have not yet disappeared.  At this stage the chromosomes have relaxed again, but they will soon recoil and condense to continue the replication process and divide again. 

ss101909Telophase.jpg



This is the G1 Phase, where the cells are growing and becoming defined in their functions.

ss101909G1 Phase.jpg

Mitosis by Sara C.

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Mitosis.jpg

G1 Interphase: coils of DNA containing different genetic codes held together, chromosomes in a relaxed state inside nuclear membrane.

Prophase: coil condenses to form chromosomes, nuclear membrane disappears, spindles which are microtubules associated with movement during division appear.

Metaphase: spindle grows and attaches to chromosomes at centromeres = kinetochore.

Anaphase: chromosomes separate into sister chromatids and are drawn to opposite poles, divided precisely to contain same genetic DNA.

Telophase: Nuclear membrane forms around identical daughter cells, cell plate, and cell wall. Citokinesis: cell plate between cell walls around daughter cells.

Boies' Mitotis - Anaphase

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Anaphase.jpg

Boies' Mitotis - Metaphase

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Metaphase.jpg

Mitosis & G1 Interphase

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Prophase_MC.jpg

Prophase - In this first stage of Mitosis the chromatin begins to coil and form the chromosomes (made up of sister chromatids).  The nuclear membrane disappears and spindles begin to form.

Metaphase_MC.jpg

Metaphase - In stage two of Mitosis, the chromosomes are the most condensed and lined up at an equatorial plate.  The spindle grows and attaches to the chromosomes at the centromeres. 

Anaphase_MC.jpg

Anaphase - In the third stage of Mitosis the chromosomes begin to separate at the centromeres.  The spindle fibers shorten pulling the sister chromatids to opposite poles of the cell.

Telophase2_MC.jpg

Telophase - In this final stage of Mitosis, the nuclear membrane reforms around each daughter cell, while a cell plate forms between the daughter cells in a process called cytokinesis.  The chromosomes relax and become loose chromatin within the nuclear membrane.

G1Interphase_MC.jpg

G1 Interphase - Cell differentiation occurs, while the cells grow and prepare to divide.


Cell cycle by Reng

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 In telophase, cytokinesis happens.  CIMG4051.jpg In anaphase, the chromosomes separate, the centromeres divide.CIMG4050.jpgIn metaphase, the spindle grows and forms attachments to the chromosomes at the centromeres. CIMG4048.jpgIn Prophase, the chromatin begins to coil and condense to form chromosomes.
CIMG4053.jpg
In G1 phase, chromosomes are held together.
CIMG4047.jpg

Cell cycle-Mike Sheely

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In prophase the chromatin begins to coil and condense to form chromosomes.During this phase, the spindle apparatus begins to appear. week 6 004.jpg

 

 In this stage the spindle grows and forms attachments to the chromosomes at the centromeres.  The chromosomes move to an imaginary equatorial plate  which is formed along the midline of the cell between the poles. The chromosomes are in their most condensed state at metaphase.

week 6 001.jpg

Chromosomes begin to seperate.When the chromosomes separate, the centromeres divide so that one of the sister chromatids migrates to one pole, and the other sister chromatid migrates to the opposite pole. The spindle fibers shorten and the sister chromatids are drawn to the opposite poles of the cell.

week 6 002.jpg

 

In this stage a cell plate forms between the two daughter cells and cell walls separate the newly formed cells in a process called Cytokinesis. The chromosomes decondense and once again become relaxed chromatin. week 6 003.jpg

 

During G1 this is the stage of growth. The white bottles are the nucleus.

 

 

cell division

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jbo prophase.JPGProphase:  Chromatin condenses to form chromosomes, spindle aparatus begins to form, nuclear membrane begins to disappear.

jbo metaphase.JPG
Metaphase:  Spindle grows and attaches to chromosomes

jbo anaphase.JPG
Anaphase:  Chromosomes seperate and move to opposite poles, spindle begins to shorten. 

jbo teleophase.JPG
Teleophase:  Cytokinesis occurs, nuclear membrane re-forms.

jbo G1.JPG
G1:  Stage of cell growth (the black things are the nucleus)

Squeaky bed experiment

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ExperimentationMC.jpg


The most minuscule movement on this bed used to result in the loudest most obnoxious squeaking noise imaginable.  It was so bad that the noise from rolling over would wake me up from a deep sleep!  The hypothesis made about why the bed was squeaking so badly was that the wooden slats were rubbing against the wooden frame of the bed creating a friction that made the squeaking noise.  The first experiment of taking the slats off and putting them back on failed, but he next experiment of placing a buffer material between the slats and the frame worked beautifully!  Now I can get a full nights sleep on my non-squeaky bed thanks to my scientific experimentation skills!

An Experience? week 5-ms

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coleus in room.jpg

making an omelette

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hippy science

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jbo granola2.JPG
I've been making my own granola for some time.  When I first started, I couldn't get it to bake evenly throughout the pan.  It would always be brown around the edges, and not completely baked in the center.  I hypothesized that if I layered it more thickly on the edges, and left a thin layer in the center, I would get better results.  So I tried it, and it worked.  I now get a pan of evenly baked golden brown granola every time.

Experimentation with vacuum- Erik Lemieux

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P1010003.JPG Experience- I finally took time to vacuum my room, and it ended up being more work than I thought.. Reflective Observation- As I was vacuuming my dorm room, I noticed the vacuum wasn't picking anything up because there wasn't enough suction. I then noticed that the container was full of dirt and that could be the reason. Hypothesis- Since the vacuum was losing suction, I thought by emptying the full container would make it regain suction. Experiment- I took the container off the vacuum and emptied it into the garbage and put it back on. This solved my problem and I could continue vacuuming

My son and the "Potty Experiment"

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Therese's Experiment

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The other day I bought a new record for my record player (yes, a record player) and when I played it for the first time the sound quality was not very good. I was worried that the sound quality was due to a problem with the record player which would be much more complicated and expensive. Instead of rushing over to a repair shop I thought that I would try to apply the scientific method and see if I could not figure out how to fix the problem myself. I reflectively observed that sometimes the poor quality of sound can be due to the record and not the player. I then hypothesized that the poor sound quality was in fact due to a poor record manufacturer rather than actual player because the player had never given me any trouble before. The first thing I did was clean the player because I wanted the player to be of good working condition. I then tested a different record on the player and observed that the sound quality was much better. This reinforced my hypothesis and I concluded that the problem was due to the record. 

Nathan's Experiment

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Once I moved into my dorm a few weeks ago I had realized I left my ethernet cord at home. So I purchased the one seen in the picture from the Bookstore, but when I plugged it in and set up my internet connection it didn't work. I noticed that my roomates was working fine and thought maybe it was a problem with my ethernet port, so I plugged my cord into his ethernet port. When that did nothing I thought maybe my cord was faulty, so I used my roommates cord for my computer and that also didnt work. Finally I figured out that I had to just re-scan my computer on Resnet.umn.edu. So once I typed in that address and clicked scan and my internet started to work

 

Nathans Experiment

Home Renovations & Problem Solving

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I think this may be a two-for-one but here it goes - when we bought our house last year, we decided that the outdated bathroom would be the first thing on our list to remodel.  I was lucky enough to have the chance to "explore" the structure a bit before we began, because somehow our bathroom did not seem as big as it should be when we measured the space.  Here is a photo of my wall exploration (very fun if you have the chance to do something like this - I highly recommend it!). 


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We found out why our measurements weren't adding up - there was space between the walls!  Yay!  The only problem was after we found the hidden space all of a sudden our sink began to back up.

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We tried Drano, we tried jiggling the plunger - nothing worked.  We eventually took off the pipe under the sink to find that it had been clogged with plaster from when I punched a hole in the wall.  Apparently fragments of the plaster had been falling in the sink and we never noticed.  Lesson learned: cover the places you don't want debris when doing any demolition!

In summary:

Experience: My bathroom sink is clogged
Observation: Since we just moved in perhaps there was an existing hair clog or another unnamed terror lurking in the pipes?
Hypothesis: Since Drano didn't take care of the problem after repeated uses, something bigger than hair must be causing the clog.
Experimentation: Removed the pipe and found the problem - plaster bits!

Chan_experiment

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I guess you could say that my experiment was a bit of Demonstration and Discovery.
Way back when I was not such a bright child.  I had found myself cornering a pretty large centipede in a deep sink in my old house.  I swear this thing was about 5 inches long.  I was so freaked out by its sight that I wanted to kill it in the most ruthless way as possible.  There were nothing in sight besides for a bunch of aerosol cans.  So I figured that I would poison it with all these chemicals and then light it on fire since I knew that these chemicals were flammable. I had the biggest evil smile on my face.  So I grabbed five unknown cans in sight and just proceeded wildly spraying it at the centipede.  The aerosol was doing its job because the centipede was rendered motionless after about a good minute of non stop chemicals spray action.  So with my feeble little mind that was not quite up to par....I did not realize that most of the fumes were still lingering around the deep sink.  I grabbed one of those grill lighters and slowly bringing it to the motionless centipede's face.  And with the sick thought of burning it, I hit the trigger and BAM!!!!  A huge giant fire ball flew out of the sink burning the hairs off my arm, eye lashes, eye brows and the tip of my head.  I let out a loud scream for my mom and she came running in and saw my hairs all singed off.  Even though I got burnt, I managed to get that nasty centipede.  But that day, I learned a huge valuable lesson.

So my Demonstration experiment, you could say, was learning that the fact of spraying all those aerosol cans at the centipede did kill it, but the fumes did not just go straight and enter into the centipede and kill it.  The Fumes also lingered around in a tight area with no way of dispersing, and lighting the a fire to burn the centipede caused a chain reaction with the flammable fumes that created the fire ball.  And I learned that a giant fireball hurts.

Using the Discover experiment, I made a test of my own, hypothesize that it was the closed area and how the fumes linger around because there was no consistency of air flow.  I did this experiment, this time, with proper equipment and protection.  Using a piece of paper as my victim, I completed the experiment successfully.

So what I learned most out of these findings is that its just easier to squish the bug then to have to run around finding an aerosol that kills insects and lighting it on fire.

Why isn't this working? - Kara W

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Experience: I'm new to my apartment. The first morning in my new bathroom, I plugged in my blow dryer into the outlet as shown and got no results.
Observation: I spent five minutes pushing the reset/test buttons trying to figure out why it wasn't working.
Hypothesis: Either its an electrical problem with the sockets/electrical wiring or my hair dryer is broken.
Experimentation: After pushing the reset/test buttons and it still not working, I flipped the other switch on the light switch next to the door. The one that controls the light over the cabinet. I tried turning on my blower dryer again and it worked! I figured out that you need to have the light switch controlling the light over the cabinet on in order for the outlet to work. There are two switches - the other controls the light/fan above the shower.

Heidi's Scientific Method

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Broken Area Vacuum - David F

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Broke.JPG Fix.JPG EXPERIENCE: I work as a maintenance worker for Bailey Hall. When I came to work the other day and our 'Area Vac' (a giant cordless vacuum) was not working. REFLECTIVE OBSERVATION: We took the top off and cleaned up inside to take a look. HYPOTHESIS BUILDING: We couldn't immediately see any broken or unconnected wires or anything that could be clogging the vacuum. My boss suggested it might be the motor. EXPERIMENTATION: My boss and I took the motor out of the vacuum and replaced it with one we had in our spare/crappy area vac. The vacuum sprung to life. A few days later, I came to work and the area vac had a new motor and was ready to use.

Experimentation.

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Hypothesis- If I wander around my house long enough I will find something that I can take a picture of, then fix, then describe the process for this assignment.

Experimentation- I first looked around my room for anything that is obviously broken, but would take little-to-no effort to fix. I noticed my screen on my window had come undone. But that looked too hard to take care of. Then I noticed an empty water glass; I thought to myself that I could take a picture of the water glass empty, then another full and describe the process. But that sounded lame. So I got up from my chair to hopefully find some juicy specimen downstairs. On the way down I remembered that my vacuum was clogged. I fetched that only to find out that it didn't have a bag anyways. I felt discouraged and thought long and hard as to what possibly could be my subject for this assignment. And as I sat there thinking, it dawned on me. I had unknowingly followed the scientific method almost exactly just by trying to figure out what to do!

Reflective observation - Thinking back I now realize the hypothesis I began with was indeed correct. The act of wandering around my humble abode led to a complete assignment. This is a victory for both me and the scientific method.

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Experiential learning cycle by Jielin Liu

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As a full time student who deals with constant stress and classes and very little exercise, I have very tense upper back and constant shoulder pain. I recently found out I had very bad posture when Im using the laptop, which adds more burdens on my upper back muscle. I thought: what if I make my laptop higher? then I have to sit straight! So I put a box full of my textbooks under the laptop, and I bought a wireless keyboard so i don't need to lift up my hands to type. and it works very well! The laptop screen is at the same height as my eyes and I can sit up straight every time i use the laptop. This way would effectively reduce the stress on my upper back muscle, problem solved! 

 

 

 

 

The Case of the Half-Eaten Chimichanga

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I opened the microwave to defrost some meat and I found a half-eaten chimichanga. I thought to myself, where could this be from? who would eat half of a chimichanga and then put it back into the microwave? Well, I had to come up with a hypothesis. I realized that I haven't been home this weekend and neither was my sister so it must have been either my sister's boyfriend or his friend, we'll call them bob and brad. I asked Bob if he knew anything about it and he said he didn't so I drew the conclusion that Brad must have been the culprit who left the half eaten chimichanga in the microwave.Case Closed.

Experiment by Ningxiao Cao

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Refrige the control ice

 

I just bought a large bottle of icecream. It was so good, but i didn't finish it. So i put it into my freezer. The next day when i try to finish it. It was melted and looks disgusting. I was so sad. So i try to figure out what's wrong with my fridge. First I check the control. It is okay and I set it highest level. And than i think what's wrong, is that machine doesn't work. So i put ice cube box in it try to figure out if it works. And it does work! I was so confused. And an other day when i wake up i find the fridge's door opened. Than i figure out my roomate forget to close the door!

hypothesis and experimentation from Bingqin

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Hypothesis: From the observation, I assume that the water and oil can not be soluble, then I begin to do the experiment.

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The 1 step: I used three cups to carry oil, soy bean sauce and water seperatedly.

The 2 step: I poured the soy bean sauce to the oil and found they can not be soluble with each other.(see picture 3)

The 3 step: I poured the water to the cup with oil and soy bean sauce and found that the water can be soluble to the soy bean sauce and both can not be soluble to oil.  

Experimentation - Kitty Emergency

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Oxford_web.jpg It was two days after bringing by 10 week kitten (Oxford) home; he was sneezing all the time, little kitty snot dripping constantly, and I could tell he was loosing energy. The worker that helped me adopt him at the Animal Humane Society warned me most kittens will have caught a cold, but at long as they are eating and drinking it would be fine. So after observing him not eating or drinking I realized I had to do something. First I tried feeding him canned food with the idea that his stuffed nose might still be able to smell it. Didn't work, so next I microwaved it hoping it would help. It intrigued him a little, but not enough. I researched online and in forums learned I should take him to the vet right away, for kittens can get dehydrated quickly and not make it. At 3 in the morning I put him in his cardboard carrier and drove him to the vet. They wanted to hook him to an IV and inject fluids and nutrients; i asked if there was another way that wasn't nearly $500. After discussing I learned it was possible to manually inject the fluid using a syringe, it just wasn't always as effective. I was in charge of holding little Oxford while the vet injected the fluid into his back. When I brought him home he drank a little water. They had also given me medicine to give him orally with a syringe to help him overcome his cold. I decided to use the syringe for squirting water in his mouth which he seemed to enjoy, and what seemed to make him more energized. The next day he was eating and exploring the house like normal!

observation from Bingqin

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When I took my soup out of the refrigerator,I found that there was some oil floating on the top of the soup.

Experimentation - Sara C.

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Reflective observations: I noticed that something in my dorm room was beginning to have a stench to it. I could identify where it was coming from - a particular corner - but I wasn't sure exactly what was causing the smell.
Hypothesis: I emptied out my garbage and figured usually recycling does not smell because it just consists of plastics, cardboard, and paper. However, I forgot that I had finished my half gallon of milk a few days prior and stuck it in the bin with little residue on the bottom which had started to mold.
Experimentation: When I saw the milk carton I knew immediately it was the source. I picked it up and looked inside and sure enough there was a white clump that was extremely sour smelling.

Experimentation

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Is your toilet running? You'd better catch it...and that's what I did. A few months back we had a problem with a running toilet. It got worse incrementally. At first we could just jiggle the handle and it would stop. A call to the landlord and about week later we had to take the lid off and push on the float and it would stop, then we got to the point of turning the water off at the shut-off valve to get the water to stop! Finally we had enough of waiting for the landlord to come over and fix it. Looking under the lid I ruled out problems with the plunger and chain, which left only one other piece that needed replacing. A little Google research and a trip to Home Depot's plumbing aisle solved our problem. Replacing the water control assembly solved the problem and our toilet has been quiet ever since. toilet.jpg

Microwave Clock-MM

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My microwave clock was not keeping time. It was about 2 hours late. I thought about how it needed to be reset and realized that I needed to use the manual. After looking for a long time to try and find the manual to figure out how to reset the clock. I found that I had to hold in the start button until the time flashed and then had to enter the time. I tried that it has been keeping time ever since. microwave.jpg

experimentation by Reng

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As I mentioned above, I pulled out something from my salad and put it into my hermit crab box - surprise! Right after I put the lettuce in, my hermit crabs climbed over to them! Hermit Crabs are nocturnal animals, but they can't resist the food on 2:30 pm! I am so glad that I found a way to fix the problem, and Thanks for reading!
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Hypothesis by Reng

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Since my crabs did not drink the water, I thought they might be dehydrated. But how to include "water" into their diet? I had a bunny before named Mozart, and it did not drink water yet got all its water from fresh lettuce. So, I thought maybe it would be good to feed my bunny some lettuce! And they can also get their vitamin C from it.

Reflective Observation by Reng

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CIMG4034.JPGMy hermit crabs normally climb a lot. And when I bought them, the seller told me to feed them purified water all the time. I fill the water container once it's empty, but recently, it seems untouched every morning.

Experimence by Reng

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I have two hermit crabs named Superman & Superamerica (I guess you can figure out who's who by their appearance:) They have been sitting inactive for a couple of days. I fed them crackers and sausage meat (the pink stuff in picture) as I always did, but they did not even touch them. So I was really worried and I really need to do something about it, otherwise they are gonna die...
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Belle the Deflected! Mission accomplished.

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Belle the Detoured!!

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Belle the Destroyer!

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Belle the beast!

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