Your objective:

Find and also make observations of cells in each phase that mitosis in plant and animal tissue. To compare the differences between plant and also animal mitosis. Be able to correctly recognize the phases native both plant and animal tissue.

Materials:

all set slide labeling "Allium root, mitosis" all set slide labeling "whitefish blastula, mitosis" compound microscopic lense

Procedures:

collection up your microscope, location the onion source slide ~ above the stage and focus on low (40x) power. relocate your on slide so that your field of see is centered on the source tip. Focus at 100x and re center so that you are focused on the much more "square" meristem cells. Focus at 400x. Gradually move the slide and also search because that cells in every phase of mitosis as soon as you have uncovered one, make a detailed observational drawing of that cell. Brand all vital structures (nucleus, chromosome, cabinet plate). Location the drawing with the kind of cell, magnification, and also phase of mitosis. Proceed with your monitorings until you have discovered cells in every phase and both you and your partner can conveniently identify every phase. Remove the onion source slide and also replace it v the whitefish blastula slide. Focus and center at 40x, 100x, and 400x magnification. Together instructed above, locate and also make observational drawings of each phase the mitosis. Answer the concerns below and then let your instructor understand you are ready for your helpful quiz.

Questions:

Which cell (plat or animal) reflects the many regularity in the direction in which that divides? provide an explanation for this difference. What evidence of cytokinesis is visible in telophase in the onion source cells? carry out you have this proof in your drawing? What proof of cytokinesis is visible in telophase in the whitefish cells? perform you have this proof in your drawing?




You are watching: Why is the whitefish embryo used to demonstrate mitosis?

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In both slides, you must be trying to find a distinct nucleus, over there is the possibility of see one or much more nucleoli together darker stained areas inside the nucleus. The cell nucleus of these cells is specifically large.
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The stains offered in both slides must make chromosomes stand out against the background. Darkly stained chromosomes will be visible. Both the these images are in late prophase.
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The chromosomes need to line up in ~ the "equator" the the cell throughout this phase. It might take a little time to acquire used to what being "in line" might mean, specifically in the onion root slides, Think the the centromeres of every chromosome gift in a relative line when the end of the chromosomes space dangling about.
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This is more than likely a bit much more distinguishable in the tree cells. Over there are now two bunches the chromosomes, (the chromatids have separated and also are more toward the poles).
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In both the plant and animal cells, the separation, personal, instance chromosomes room no much longer distinguishable and the darkly stained genetic material is incased in new nuclear membranes. What proof of cytokinesis do you see in every picture?
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