Final Answer:
1. Interphase
2. Prophase
3. Metaphase
4. Anaphase
5. Telophase & Cytokinesis
6. Chromatin
7. Chromosome
8. Centromere
9. Sister chromatids
10. Spindle fibers
11. Nuclear membrane
12. Cell plate (in plant cells) or cleavage furrow (in animal cells)
13. Chromosomes condense and become visible; nuclear envelope breaks down
14. Spindle fibers attach to centromeres of chromosomes
15. Chromosomes line up at the equator (metaphase plate)
16. Sister chromatids separate and move to opposite poles
17. Nuclear membranes reform; chromosomes decondense; cytokinesis begins
18. Two
19. 46
20. 23
21. 46
22. 23
23. Chromosomes
24. Centrosomes (or centrioles in animal cells)
25. Mitosis
26. Meiosis
27. 4
28. 23
29. 23
30. 23
31. Homologous chromosomes pair up and may exchange segments (crossing over)
32. 23
33. 46
34. 23
35. 23
36. 23
37. 23
38. 23
39. 23
40. Chromosomes
Parent Tip: Review the logic above to help your child master the concept of the cell cycle worksheet answer key.