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Animal Development

Animal Development. Mr. Price AP Biology. Acrosomal Reaction. Egg penetration Receptor recognition Fusion of membranes Fast block to polyspermy. Cortical Reaction. Vitelline layer separates Perivitellin space swells Hardening Fertilization Envelope Slow block to polyspermy.

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Animal Development

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  1. Animal Development Mr. Price AP Biology

  2. Acrosomal Reaction • Egg penetration • Receptor recognition • Fusion of membranes • Fast block to polyspermy

  3. Cortical Reaction • Vitelline layer separates • Perivitellin space swells • Hardening • Fertilization Envelope • Slow block to polyspermy

  4. Activation of the Egg • CR and PS increase • Fusion of nucleus • DNA synthesis and cell division

  5. Fertilization (Mammals) • Capacitation • Sperm reaches Zona Pellucida • ZP3 binding • Fast and Slow Block • Sperm taken in • Centrosomes • Mitosis begins

  6. Cleavage • Smaller blastomeres • Differentiation • Animal and Vegetal Pole • Gray crescent marks dorsal • 2 vertical before 1 horizontal • Morula • Blastocoel • Blastula

  7. Gastrulation • Gastrula forms • Endoderm • Mesoderm • Ectoderm • Invagination • Archenteron • Blastopore • Involution

  8. Organogenesis • Notochord forms • Neural Tube • Vertebral Discs • Somites

  9. Avian Development • Blastodisc forms • Primitive streak forms • Archenteron created • Extraembryonic Membranes

  10. Mammalian Development • Blastocyst enters uterus • Trophoblast penetrates endometrium • Extraembryonic layers form • Gastrulation

  11. Mammal Fertilization

  12. Cleavage

  13. Gastrulation (Frog Embryo)

  14. Organogenesis (Frog)

  15. Avian Development

  16. Mammalian Development

  17. Extraembryonic Membranes

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