AP 1 Lab 3

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Jan 9, 2024

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Lab 3 Mitosis and Meiosis BIO201L Student Name: Click here to enter text. Access Code (located on the lid of your lab kit): Click here to enter text. Pre-Lab Questions ” 1. What are chromosomes made of? ” Click here to enter text. ” 2. Compare and contrast mitosis and meiosis. ” Click here to enter text. ” 3. Cancer is a disease related to uncontrolled cell division. Investigate two known causes for these rapidly dividing cells and use this knowledge to invent a drug that would inhibit the growth of cancer cells. ” Click here to enter text. Experiment 1: Observation of Mitosis in a Plant Cell Table 1: Mitosis Predictions Predictions Click here to enter text. Supporting Evidence Click here to enter text. Table 2: Mitosis Data Chosen Image Click here to enter text. Stage Number of Cells in Stage Total Number of Cells Calculated % of Time Spent in Stage Interphase Click here to enter text. Click here to enter text. Click here to enter text. Prophase Click here to enter text. Click here to enter text. Click here to enter text. Metaphase Click here to enter text. Click here to enter text. Click here to enter text. Anaphase Click here to enter text. Click here to enter text. Click here to enter text. Telophase Click here to enter text. Click here to enter text. Click here to enter text. Cytokinesis Click here to enter text. Click here to enter text. Click here to enter text.

Lab 3 Mitosis and Meiosis BIO201L Table 3: Stage Drawings Cell Stage Drawing REMEMBER: Your drawings should have your name and access code handwritten in the background. Interphase Prophase Metaphase

Lab 3 Mitosis and Meiosis BIO201L Cell Stage Drawing REMEMBER: Your drawings should have your name and access code handwritten in the background. Anaphase Telophase Cytokinesis Post-Lab Questions ” 1. Label the arrows in the slide image below with the appropriate stage of the cell cycle. ” A- Click here to enter text. B- Click here to enter text. C- Click here to enter text.

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Lab 3 Mitosis and Meiosis BIO201L D- Click here to enter text. E- Click here to enter text. F- Click here to enter text.

Lab 3 Mitosis and Meiosis BIO201L ” 2. What stage were most of the onion root tip cells in? Why does this make sense? ” Click here to enter text. ” 3. As a cell grows, what happens to its surface area : volume ratio? (Think of a balloon being blown up). How is this changing ratio related to cell division? ” Click here to enter text. ” 4. What is the function of mitosis in a cell that is about to divide? ” Click here to enter text. ” 5. What would happen if mitosis were uncontrolled? ” Click here to enter text. ” 6. How accurate were your time predictions for each stage of the cell cycle? ” Click here to enter text. ” 7. Discuss one observation that you found interesting while looking at the onion root tip cells. ” Click here to enter text. Experiment 2: Tracking Chromosomes Through Mitosis Once you have completed the digital exercise, select the “Results Table” button at the bottom right- hand corner of the screen and select the “Generate PDF” button at the top of the following screen. Insert your download into this document by selecting the Insert > Object > Text from file. Resize if necessary. Post-Lab Questions 1. How many chromosomes were present before mitosis? Click here to enter text. 2. How many chromosomes did each of the daughter cells contain after mitosis?

Lab 3 Mitosis and Meiosis BIO201L Click here to enter text. 3. Cite an example of a type of cell that undergoes mitosis. Why is it important for each daughter cell to contain information identical to the parent cell? Click here to enter text. 4. Human skin cells divide at a higher rate than neurons (nerve cells). Hypothesize why this may be. Click here to enter text. 5. Hypothesize what would happen if the sister chromatids did not split equally during anaphase of mitosis. Click here to enter text. Experiment 3: Following Chromosomal DNA Movement through Meiosis Part 1: Once you have completed the digital exercises, take screenshots and insert them below. Resize if necessary. Table 5a (Meiosis I): Table 5b (Meiosis II):

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Lab 3 Mitosis and Meiosis BIO201L Parts 2, 3, and 4: Once you have completed the digital exercise, select the “View Data Table” button at the bottom left-hand corner of the home screen. Review your table. If you would like to make any changes, select the “Return” button in the bottom right-hand corner. If you are satisfied with your answers, take a screenshot and insert it below. Resize if necessary:

Lab 3 Mitosis and Meiosis BIO201L Post-Lab Questions 1. How did crossing over affect the genetic content in the gametes? Use your results to support your answer. Click here to enter text. 2. What is the ploidy of the daughter cells at the end of meiosis I? What about at the end of meiosis II? Click here to enter text. 3. List two differences between meiosis I and meiosis II. Click here to enter text. 4. Based on your observations in the digital exercise, what can you conclude about the severity of nondisjunction that occurs in meiosis I as opposed to meiosis II? Click here to enter text. 5. Why is it necessary to reduce the number of chromosomes in gametes, but not in other cells? Click here to enter text. 6. Blue whales have 44 chromosomes in every cell. Determine how many chromosomes you would expect to find in the following: ” ” Sperm Cell: ” Click here to enter text. ” Egg Cell: ” Click here to enter text. ” Daughter Cell from Mitosis: ” Click here to enter text. ” Daughter Cell from Meiosis II: ” Click here to enter text. Experiment 4: The Importance of Cell Cycle Control Data: 1. Click here to enter text. 2. Click here to enter text. 3. Click here to enter text. 4. Click here to enter text. 5. Click here to enter text. Post-Lab Questions ” 1. Record your hypothesis from Step 1 in the Procedure section here. ” Click here to enter text. ” 2. What do your results indicate about cell cycle control? ” Click here to enter text.

Lab 3 Mitosis and Meiosis BIO201L ” 3. Suppose a person developed a mutation in a somatic cell which diminishes the performance of the body’s natural cell cycle control proteins. This mutation resulted in cancer yet, but was effectively treated with a cocktail of cancer-fighting techniques. Is it possible for this person’s future children to inherit this cancer-causing mutation? Be specific when you explain why or why not. ” Click here to enter text. ” 4. Why do cells which lack cell cycle control exhibit karyotypes which look physically different than cells with normal cell cycle. ” Click here to enter text. ” 5. What are HeLa cells? Why are HeLa cells appropriate for this experiment? ” Click here to enter text. ” 6. Research the function of the protein called p53. What does this function do? Explain how it can affect cell cycle control. ” Click here to enter text. ” 7. What is the Philadelphia chromosome? How is this chromosome related to cancer? Identify how this chromosome appears physically different on a karyotype than it appears on a karyotype of normal chromosomes. ” Click here to enter text.

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