“Multiply, Divide, & Survive” L8 Getting Started “Multiply, Divide, & Survive”

1. Most eukaryotic cells undergo a series of steps to divide into two cells. What are these steps called? 2. These 2 stages are collectively called __ __. 3. Scientists discovered rod-shaped structures in the cells’ nuclei that became noticeable just before the cells split. What are these structures called?

4. What are chromosomes composed of? 5. Why are chromosomes important? 6. How do chromosomes occur in the cells’ nuclei? 7. Do all organisms have the same number of chromosomes in their cells?

8. How many chromosomes do humans have? 9. How many chromosomes do Wisconsin Fast Plants have? 10. On each chromosome, there are hereditary units or sections known as ___.

11. When cells are not dividing, they are in a stage called ___. 12. During this phase, the cell is carrying on its life processes, including ___. 13. Why are the chromosomes not visible during this phase?

14. During interphase, when the chromosomes are not visible, they are referred to as ___. 15. What happens to the DNA during this phase? 16. The new cells that are created during mitosis are known as __ __.

17. What are the 4 stages of mitosis? 18. During prophase, a structure of fibers develop to guide the movement of the chromosomes. What are these fibers called? 19. What happens during metaphase?

20. What are centromeres? 21. What happens during anaphase? 22. When does telophase begin? 23. What happens during cytokinesis? 24. Most of a cell’s life cycle is spent in which phase of cell division?