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 Invagination Archenteron Blastopore
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