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Topic : Reproduction Aim : Explain the processes of sexual reproduction and meiosis.

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.

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Topic : Reproduction Aim : Explain the processes of sexual reproduction and meiosis.

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  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.

  2. 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.

  3. 2 types of cells in your body 1. SOMATIC CELLS = body cells with 46 chromosomes

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

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

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

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

  8. 4 Daughter cells have half the normal # of chromosomes 23 23 46 23 23

  9. 2 stages: Meiosis I, Meiosis II

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

  11. What is the name of the process that produces gametes? • Mitosis • Binary fission • Asexual reproduction • Meiosis

  12. Cells such as nerve cells and muscle cells are known as • gametes • sex cells • somatic cells • specialized cells

  13. Which statement is true about sexual reproduction? • It produces offspring with half the number of chromosomes as the parent. • It involves sex cells joining together. • It produces offspring that are genetically identical to the parents.

  14. The result of meiosis are daughter cells that have • half the number of chromosomes • a quarter of the number of chromosomes • double the number of chromosomes • the same number of chromosomes

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

  16. A B C D E • What process is represented in the diagram? • Describe the genetic makeup of daughter cells. • What does phase A represent? What occurs in this phase? • Explain what is occurring at phase E.

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