Divvy it Up |
Purpose: Using slides of the onion root tip, you will observe the mitotic stages in actively dividing cells.
Reasoning Questions:
Answer the following questions in complete sentences
1. What percentage of the cells you observed were undergoing mitosis? Use the formula provided to calculate your answer. Show your work.
a. % Cells in mitosis= (Total number of cells in mitosis)/(Total number of cells) *100
b. Graph your answer using a pie graph
2. Using the data from Table 1 and the formula provided, determine the percent of cells in each of the stages listed in Table 3.
a. % = (Number of cells in stage)/(Total number of cells) *100
b. Graph your answer
3. What are the stages of the cell cycle? In which stage of the cell cycle were most of the cells that you observed?
4. Based on the number of cells observed in each stage of mitosis, which stage takes the longest amount of time to complete? The shortest amount of time to complete? Explain your reasoning.
5. What is the role of mitosis in the distribution of genetic information to new cells?
Reasoning Questions:
Answer the following questions in complete sentences
1. What percentage of the cells you observed were undergoing mitosis? Use the formula provided to calculate your answer. Show your work.
a. % Cells in mitosis= (Total number of cells in mitosis)/(Total number of cells) *100
b. Graph your answer using a pie graph
2. Using the data from Table 1 and the formula provided, determine the percent of cells in each of the stages listed in Table 3.
a. % = (Number of cells in stage)/(Total number of cells) *100
b. Graph your answer
3. What are the stages of the cell cycle? In which stage of the cell cycle were most of the cells that you observed?
4. Based on the number of cells observed in each stage of mitosis, which stage takes the longest amount of time to complete? The shortest amount of time to complete? Explain your reasoning.
5. What is the role of mitosis in the distribution of genetic information to new cells?
The Letter “e”
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Purpose: Learn the basic of how to use a microscope.
Reasoning Questions:
Answer the following questions in complete sentences.
1. Why is the compound microscope called a compound microscope? AND how determine the total magnification of the compound microscope?
2. Describe at least two safety precautions involved with using a microscope.
3. There are several different types of microscopes. Pick any two (other than compound light microscopes). Describe how they are different from light microscopes and an advantage of using that type of microscope
4. Draw how the letter f would look when viewed under the compound light microscope
5. Is high power always better than low power for examining a specimen? Explain.
Reasoning Questions:
Answer the following questions in complete sentences.
1. Why is the compound microscope called a compound microscope? AND how determine the total magnification of the compound microscope?
2. Describe at least two safety precautions involved with using a microscope.
3. There are several different types of microscopes. Pick any two (other than compound light microscopes). Describe how they are different from light microscopes and an advantage of using that type of microscope
4. Draw how the letter f would look when viewed under the compound light microscope
5. Is high power always better than low power for examining a specimen? Explain.
Snitches with Stitches
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Purpose: This activity is used to help you become better at using a microscope and learning how to focus on different objects at different depths.
Reasoning Questions:
Answer the following questions in complete sentences.
Analysis:
1. Did you get the order correct in each of the slides? How?
2. What are some methods that you used to help you determine the order of the threads?
3. Draw a diagram of the microscope and label each part and add the purpose of the part.
Reasoning Questions:
Answer the following questions in complete sentences.
Analysis:
1. Did you get the order correct in each of the slides? How?
2. What are some methods that you used to help you determine the order of the threads?
3. Draw a diagram of the microscope and label each part and add the purpose of the part.
The approximate times it takes a cell to go through the various stages of the cell cycle in a typical mammalian cell are listed here:
• G1 – 5 to 6 hours
• S – 10 to 12 hours
• G2 – 4 to 6 hours
• M – 1 to 2 hours
Based on the time frame, create a pie chart that reflects the approximate hours of each stage.
• G1 – 5 to 6 hours
• S – 10 to 12 hours
• G2 – 4 to 6 hours
• M – 1 to 2 hours
Based on the time frame, create a pie chart that reflects the approximate hours of each stage.