1. Topic: Reproduction Aim: Explain the processes of sexual reproduction and meiosis. Do Now: Phases of Mitosis Worksheet HW: Read pages 627-629. Write a paragraph comparing and contrasting the male and female reproductive systems.

7. As a result of mitotic cell division, a cell having 40 chromosomes gives rise to two cells each of which has a chromosome number of _______ chromosomes.

8. 2 types of cells in your body 1. SOMATIC CELLS = body cells with 46 chromosomes

11. 2. GAMETES = sex cells with 23 chromosomes (1/2) –Egg & sperm

13. Sexual Reproduction 2 parents Gametes from each join to produce new organism

14. Why do gametes have half the chromosome number? 23 46

15. Meiosis Gametogenesis Cell division that produces gametes http://www.youtube.com/watch?v= Ba9LXKH2ztU&feature=related

16. 4 Daughter cells have half the normal # of chromosomes 46 23

17. 2 stages: Meiosis I, Meiosis II

23. Let’s summarize… 1.Describe the two types of cells that our bodies consist of. 2.Explain the difference between asexual and sexual reproduction. 3.Explain the difference between mitosis and meiosis.

24. What is the name of the process that produces gametes? (1)Mitosis (2)Binary fission (3)Asexual reproduction (4)Meiosis

25. Cells such as nerve cells and muscle cells are known as (1)gametes (2)sex cells (3)somatic cells (4)specialized cells

26. Which statement is true about sexual reproduction? (1)It produces offspring with half the number of chromosomes as the parent. (2)It involves sex cells joining together. (3)It produces offspring that are genetically identical to the parents.

27. The result of meiosis are daughter cells that have (1) half the number of chromosomes (2) a quarter of the number of chromosomes (3) double the number of chromosomes (4) the same number of chromosomes

28. The number of chromosomes found in human gametes is (1)46 (2) 92 (3) 23

29. 1.What process is represented in the diagram? 2.Describe the genetic makeup of daughter cells. 3.What does phase A represent? What occurs in this phase? 4.Explain what is occurring at phase E. ABC D E