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Topic : Reproduction Aim : Describe the process of fertilization.

Learn the intricate process of fertilization in humans and organisms, the differences between internal and external fertilization, and the stages of cell division. Identify key reproductive structures and their roles.

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Topic : Reproduction Aim : Describe the process of fertilization.

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  1. Topic: Reproduction Aim: Describe the process of fertilization. Do Now: Label female reproductive system pictures from yesterday’s notes. HW: Embryonic Development Reading Notes CL Mitosis and Asexual repro due Tuesday, February 24th.

  2. Centromere A • Identify the structure in the diagram. • Identify the phase of mitosis where this structure produced. • Identify structures A and B. Chromatids B

  3. Ovary Oviduct Uterus Urinary bladder Vagina

  4. Oviduct Ovary Uterus Cervix Vagina

  5. 1. Describe the process of fertilization. http://www.youtube.com/watch?v=9MnQxiSJZ4Q

  6. Process of a sperm joining an egg cell.

  7. 2. Where does fertilization usually occur? • Upper portion of oviduct.

  8. 3. Identify the number of chromosomes found in female and male gametes. • 23 Sperm Egg 23 23

  9. 4. Identify another name for a fertilized egg. • Zygote Sperm Egg + Zygote

  10. 5. How many chromosomes are found in a human zygote? • 46 Sperm Egg + Zygote 23 46 23

  11. Identical Twins

  12. External Fertilization • Egg fertilized outside female body • Aquaticorganisms (fish)

  13. Large # of eggs and sperm released increases chance of fertilization

  14. Coral: release egg & sperm at the same time

  15. Internal Fertilization • Fertilization inside female • Terrestrial(land) organisms

  16. Fewer eggs needed bc well protected

  17. Let’s summarize… Explain what occurs during the process of fertilization. In humans, where does fertilization occur? Explain TWO differences between external and internal fertilization.

  18. Sperm cells and egg cells are which type of cells? • Identify the type of cell division that is used to produce these cells. • Where are these cells produced? • In humans, how many chromosomes are found in each of these cells?

  19. Identify all labeled structures in the diagram. Identify the structure where the embryo develops. Where can an egg be fertilized? Which structure releases eggs? Identify the hormones structure A secretes.

  20. Centromere Chromatids

  21. C D E B A • Identify the process represented in the diagram above. • 2. Explain how this process is different from animal cell mitosis. • 3. When does chromosome replication occur? • 5. When are the chromatids pulled apart and begin moving to opposite poles? • 4. Where is cytokinesis occurring? Explain this process. • If the first cell is made up of 32 chromosomes, how many chromosomes are found in the daughter cells?

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