Chapter 46 and 47. Asexual Reproduction Fission Fragmentation and regeneration Budding Parthenogenesis.

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Principles of Biology, 21 April 2009
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Presentation transcript:

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

The Female Reproductive System

Oogenesis Controlled by gonadotrophic hormones: FSH LH Estrogen Progesterone

Types of Ovulation Reflexogenic Ovulators Periodic Ovulators Short Periodic Ovulators

Male Reproductive System

Spermatogenesis In seminiferous tubules FSH stimulates Sertoli cells LH stimulates Leydig cells

Fertilization (Fallopian Tubes)

Blocks to Polyspermy Fast block – Change in polarization Slow block – Signal transduction pathway

The Gray Crescent

Cleavage - Morula

Blastula Inner mass = future embryo Trophoblast = future placenta, secretes HCG

Gastrulation Protostomes vs. deuterostomes Dorsal lip of the blastopore

Fate Mapping

Germ Layers & Organogenesis

The Primitive Streak

Apical Ectodermal Ridge (AER)

Zone of Polarizing Activity (ZPA)

The First Trimester

The Second Trimester

The Third Trimester

Labor & Delivery

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