1. Cell Division – a review

2. Cell Cycle Control: What happens at each checkpoint? M = mitosis (nuclear division) C = cytokinesis (cytoplasmic division) G = gap (cell growth) S = synthesis (DNA replicated, cell growth)

3. When to Divide?

4. Growth Inhibition

5. Control Problems - Cancer

6. Supercoiling (DNA coils forming a chromatid)

7. Human Chromosomes (unreplicated)

8. Human Chromosomes (replicated and supercoiled)

9. Chromosome (replicated)

10. Chromosome Each DNA molecule coils to form a single chromatid. The two chromatids of a replicated chromosome are genetically identical.

11. The Cell Cycle (Overview)

12. Mitosis - Stages

14. Prophase and Metaphase

15. Anaphase and Telophase

17. Cytokinesis (animal and plant)

18. MEIOSIS the other type of nuclear division

19. Gametes… why haploid?

20. Oogenesis

21. Spermatogenesis

22. Meiosis

23. Meiosis Overview

24. Meiosis (Part I)

25. Meiosis (Part II)

26. Independent Assortment of Chromosomes

27. Independent Assortment another view

28. What happens when chromosomes do not separate properly during meiosis? Nondisjunction

29. Down’s Syndrome trisomy 23

30. Crossing Over Leads to Genetic Variability

31. Compare Mitosis and Meiosis

32. Mitosis vs. Meiosis