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Reproduction & Embryology. Chapter 46 and 47. Asexual Reproduction. Fission Fragmentation and regeneration Budding Parthenogenesis. Sexual Reproduction. Hermaphroditism – continual Hermaphroditism - sequential. Animal Reproduction, continued. Fertilization: internal vs. external
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Reproduction & Embryology Chapter 46 and 47
Asexual Reproduction • Fission • Fragmentation and regeneration • Budding • Parthenogenesis
Sexual Reproduction • Hermaphroditism – continual • Hermaphroditism - sequential
Animal Reproduction, continued • Fertilization: internal vs. external • Environmental vs. courtship • Oviparous vs. viviparous • Monotreme, marsupial, & eutherian mammals • Role of pheromones
Oogenesis • Controlled by gonadotrophic hormones: • FSH • LH • Estrogen • Progesterone
Types of Ovulation • ReflexogenicOvulators • Periodic Ovulators • Short Periodic Ovulators
Spermatogenesis • In seminiferous tubules • FSH stimulates Sertoli cells • LH stimulates Leydig cells
Blocks to Polyspermy • Fast block – Change in polarization • Slow block – Signal transduction pathway
Blastula • Inner mass = future embryo • Trophoblast = future placenta, secretes HCG
Gastrulation • Protostomes vs. deuterostomes • Dorsal lip of the blastopore