Name: ___________________________ Period: ____________ Date: _____________________

How Cells Divide: MitosisWorksheet to accompany PBS Nova Animation

http://www.pbs.org/wgbh/nova/baby/divide.html

Before We Split

1. How many chromosomes are in the human genome?

2. What will be the end result of mitosis?

Draw the cell as it appears during this stage. Label the following parts:

- Nuclear envelope- Nucleolus- Chromatin- Centrioles

Interphase

3. What replicates during this time?

4. Why are the chromosomes not visible during this time?

Draw the cell as it appears during this stage. Label the following parts:

- Nuclear envelope- Nucleolus- Chromatin- Centrioles

Prophase

5. What form do the chromosomes take at this point?

6. What is the difference between chromosomes and chromatids?

7. What happens to the nuclear membrane during this stage?

8. What role do the centrioles play during this stage?

Draw the cell as it appears during this stage. Label the following parts:

- Nuclear envelope- Spindle fibers- Chromosomes- Centrioles

Metaphase

9. What happens to the chromosomes during this stage?

10. What role do the spindle fibers take during this stage?

Draw the cell as it appears during this stage. Label the following parts:

- Chromosomes- Spindle fibers- Centrioles

Anaphase

11. What changes occur during this stage?

Draw the cell as it appears during this stage. Label the following parts:

- Chromosomes- Spindle fibers- Centrioles

Telophase

12. What changes occur during this stage?13.14. The division of the ____________________ is now complete.

Draw the cell as it appears during this stage. Label the following parts:

- Chromosomes- Nuclear envelope- Centrioles- Spindle Fibers

Cytokinesis

15. What changes occur during cytokinesis?

Draw the cell as it appears during this stage. Label the following parts:

- Chromosomes- Nucleolus- Centrioles- Nuclear envelope