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Name________________________ Date____________ Period_____ Mitosis and Meiosis Review 1. How many single chromosomes do humans have in their body cells? ______ 2. How many chromosome pairs do humans have in their body cells? ______ 3. How many single chromosomes do humans have in their sex cells? ______ 4. How many chromosome pairs do humans have in their sex cells? ______ 5. How many single chromosomes do humans have in a fertilized egg? ______ 6. How many chromosome pairs do humans have in a fertilized egg? ______ 7. How many chromosomes are found in a cell in your nose? ______ 8. How many chromosomes are found in a cell in your toe? ______ 9. If a male dog has 20 chromosomes in his sperm cell, how many does he have in a body cell? ______ 10. Describe the purpose of mitosis. ______________________________ __________________________________________________________ 11. How many times does the cell divide during mitosis? ________________ 12. What kind of cells are produced at the end of mitosis? ______________ 13. What are sister chromatids? _________________________________ __________________________________________________________ 14. Is cytokinesis part of mitosis? Explain.__________________________ __________________________________________________________ 15. Briefly describe what happens during interphase. __________________ __________________________________________________________ 16. Describe the purpose of meiosis _______________________________ __________________________________________________________ 17. How many times does the cell divide during Meiosis? ________________ 18. What kind of cells are produced at the end of meiosis? ______________ 19. What do you think would happen if the nuclear membrane did not dissolve and go away during mitosis?_____________________________________ __________________________________________________________ 20. The cell cycle starts with ______________ (where the chromosomes are duplicated), followed by _____________ (where the cell divides), and ends with __________________ (where the cytoplasm splits in two forming two separate new cells). Look at the picture below and answer the questions that follow: x x x 21. Which stage of the cell cycle is this above cell in? 22. Which stage of mitosis is the above cell in? 23. How many chromatids are present in the picture? 24. How many chromosomes will be present in each of the new cells after the cell divides? What is the relationship between the following terms? 25. chromatin and chromatid 26. centromere and spindle fiber 27. mitosis and meiosis Cell Division Review Across 4. holds two sister chromatids together 5. cells that contain half the number of chromosomes in the nucleus. 7. process that results in 4 daughters cells each with half the number of chromosomes as parent cell. 9. division of the cytoplasm to form two cells. 10. stage where chromosomes line up in the middle of the cell 11. stage of mitosis that occurs at the same time the cytoplasm starts to divide Down 1. where a cell spends most of its time preparing for cell division 2. stage of mitosis where chromatids separate and go to opposite sides of the cell. 3. stage where the nuclear membrane disappears. 6. cells that contain a complete set of chromosomes in the nucleus 7. asexual cell division 8. male sex cells 12. female sex cells
