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1. What are three reasons for cell division:
a.
b.
c.
2. In your own words describe the different stages of the Cell Cycle. Remember to include the following stages:
3. Go to https://www.biology.arizona.edu. Click on Activities (left hand side)àCell BiologyOnion Root Tips. Read background information on Mitosis. Click on Next until you come to the Online Onion Root Tips assignment. Click on Next to begin. Program will guide you through. You will be asked to identify various stages of mitosis. The program will tell you if you are right or wrong. It will also tell you why you are wrong. Go through the complete set of pictures.
Complete the table below and within a paragraph or two tell me what you discovered about mitosis based on your activity results.
Interphase
Prophase
Metaphase
Anaphase
Telophase
Total
# of cells
36
% of cells
100
Time
24
4. List the differences and similarities between typical cell division and unregulated cell division.
Differences
Similarities
5. Identify where there are checkpoints within the cell cycle to help control cellular division. Indicate the question asked and how each stops the progression of cell division.
6. What are the three major ways in which DNA mutations can arise?
2. How do proto-oncogenes and tumor-suppressor genes regulate the cell cycle?
Proto-oncogenes -
Tumor-suppressor-
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