What Holds the Two Sister Chromatids Together

Life Science Test Name______40 points Block______

Mitosis

I. Definitions and Explanations. 3pts each. Choose six.

1. What is the definition of mitosis?

2. What is the purpose of cellular reproduction?

3. Name the four phases of mitosis in order.

4. What are the three stages of the cell cycle?

5. What are chromosomes?

6. What happens during the last phase of mitosis?

7. What is cytokinesis?

8. What role do the centrioles play in mitosis? II. Matching. 1 pt. Each. Write the letters that match these statements. a. prophase f. centromere b. metaphase g. eukaryotic c. anaphase h. nucleus d. telophase i. sister chromatids e. interphase j. spindle

9. This structure holds the two sister chromatids together. ______10. The structure that forms between the two sets of centrioles.______11. Chromatin condenses into chromsomes during this phase of mitosis. ______12. These kinds of cells undergo mitosis.______13. During this phase of mitosis, chromosomes begin to move towards opposite poles of the cell.______14. During this phase, the chromosomes revert to chromatin.______15. This is the name for the two identical halves of the chromosome seen during metaphase.______16. This is where chromosomes are found in a cell. ______17. During this stage of mitosis, the chromosomes line up on the equator.______18. This stage of the cell cycle lasts the longest.______

III. Short Answer. 2 points each.

19. If a parent cell has five chromosomes, how many chromosomes will each of the daughter cells have?______

20. What are the sister chromatids called once they split apart? ______

21. How many new cells are created by mitosis?______

22. What two stages of the cell cycle are NOT part of mitosis? ______

23. What is condensed chromatin called?______24. Draw a picture of anaphase.

Extra Credit !!!

For each phase of mitosis, draw a picture and give an explanation for what is happening inside the cell.