This Module 5: Lesson 3 Assignment is worth 37 marks. The value of each assignment and each question is stated in the left margin.
(37 marks) Lesson 3 Assignment—Mitosis
You should now have functional knowledge of each of the phases of mitosis. To observe the characteristics and features of mitotic cell division, you will complete a lab.
You have two options for completing this lab.
• Option A: Complete the online simulation “Cell Division Exploration,” which is accessible from page 2 of Lesson 3.
• Option B: Complete “Investigation 16.B: Observing the Cell Cycle in Plant and Animal Cells” on page 559 in your textbook.
Complete the lab as directed, and then answer the following questions.
(4 marks) 1. Under the Relative Duration of Phases heading, you will need to follow the instructions to create a table that displays four sets of data. When the table is complete, click on “Export” in the simulation, and then choose “Edit” and “Paste” to copy the data into the Answer box below. If that does not work, you will need to recreate the table manually in the Answer box below.
(6 marks) 2. Based on the table you created for question 1, calculate the average number of cells in each of the four phases of mitosis as well as the number of cells in interphase and cytokinesis. Record those calculations below.
(12 marks) 3. The percentage of cells in each phase reflects the amount of time that a given cell spends in each of the phases. For example, if 10% of the cells you found were in prophase, and the cell cycle was 12 hours long, you would expect prophase to last about 1.2 hours (12 h × 0.10 = 1.2 h). Based on your table, calculate how long each phase was for your sample and record those calculations below.
(4 marks) 4. Which phase of both the cell cycle and mitosis had the largest average number of cells? What can you conclude about the amount of time that cells spend in this phase?
(2 marks) 5. Which phase had the smallest average number of cells? What can you conclude about the amount of time that cells spend in this phase compared to the other phases?
(2 marks) 6. Based on your data, how long does an average cell spend in each of the six phases of the cell cycle?
(2 marks) 7. What part of mitosis takes the longest amount of time? What part was the shortest? Why do you think this is?
(2 marks) 8. In humans and most other living things, the duration of the cell cycle is closely regulated. What do you think would happen if cell division occurred in an uncontrolled way? If possible, discuss your ideas with your classmates and teacher and write a summary of your thoughts below.
(3 marks) 9. Prepare a table to compare and contrast the events of the cell cycle in plant cells and animal cells. Place your table in the Answer box below.
(37 marks) Option B
Complete “Investigation 16.B: Observing the Cell Cycle in Plant and Animal Cells” on pages 559 and 560 in the textbook.
(4 marks) 1. Answer “Procedure” question 7.
(10 marks) 2. Answer “Procedure” question 8.
(10 marks) 3. Answer “Procedure” question 9.
(3 marks) 4. Answer “Analysis” question 1.
(3 marks) 5. Answer “Analysis” question 2.
(2 marks) 6. Answer “Analysis” question 3.
(2 marks) 7. Answer “Analysis” question 4.
(3 marks) 8. Answer “Analysis” question 5.
Once you have completed all of the questions, submit your work to your teacher.
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