BIO101L Lab 5.docx.pdf

3 were there any stages of the cell cycle that you

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3. Were there any stages of the cell cycle that you did not observe? How can you explain this using evidence from the cell cycle? I did not observe metaphase or cytokinesis. 4. As a cell grows, what happens to its surface area to volume ratio? (Hint: Think of a balloon being blown up). How does this ratio change with respect to cell division? As a cell grows, both the surface area and volume increase. However, the surface area does not increase at the same rate as the volume. Because of this, there is an inverse relationship--the surface area to volume ratio decreases as the size of the cell increases. Once the cell divides, the surface area to volume ratio is back to normal because the cell is now smaller (decreased surface area). 5. What is the function of mitosis in a cell that is about to divide? Mitosis is the process of preparing one cell to divide into two identical cells. It ensures that the chromatids are replicated properly and that the daughter cells will function as needed. 6. What would happen if mitosis were uncontrolled? If mitosis is uncontrolled, then cells would continue dividing even when additional cells were not needed. The cells would not know when to stop reproduction. The cells would likely contribute to growths, such as tumors, which could lead to cancer or other disease in the organism. 7. How accurate were your time prediction for each stage of the cell cycle? My predictions were somewhat accurate, but there was a substantial margin of error (about 8% for interphase). Experiment 2: Tracking Chromosomal DNA Movement through Mitosis Cell Cycle Division: Mitosis Beads Diagram: Insert photos of your drawings in the appropriate area for each stage of the cell cycle (please include your name in each of the sketches): Please note that my lab kit only included 31 pop-it beads. I had to use one of the other beads and tape it to the rest of the chromatid to complete the second blue strand of 6.
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Lab 5 Mitosis BIO101L Prophase Number of chromatids present per cell: 8 chromatids Metaphase Number of chromatids present per cell: 8 (1 cell)
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