Chapter 46: Animal Reproduction Laura Haselman AP Biology Block F

Asexual and Sexual Reproduction Animals may reproduce asexually (no fusion of egg/sperm), sexually (fusion of gametes to form a zygote), or they may alternate between the two modes. Reproductive cycles are often related to changing seasons example of an asexually reproducing animal example of a sexually reproducing animal

External and Internal Fertilization Fertilization is the union of sperm and egg External: eggs are released by the female into a wet environment, where they are fertilized by the male Internal: sperm are deposited in the female reproductive tract, and fertilization occurs within the tract

Reproductive organs produce and transport gametes Gametes are sexual reproduction cells Gonads are the organs that produce gametes in most animals Ducts transport the gametes

Gametogenesis Gametogenesis is the process of gamete production in the mammalian body Oogenesis is the development of mature ova (egg cells) Spermatogenesis is the production of mature sperm cells The reproductive cycle is regulated by changing hormone levels in the blood

Oogenesis Model

Spermatogenesis Model

Gestation Gestation = Pregnancy It is the condition of carrying one or more embryos (new developing individuals) in the uterus (AKA the womb). Gestation can be divided into three trimesters

Works Cited Photograph. Healthy Aging. Carter. Web. 6 Sept Photograph. Human Development. Web. 6 Sept Photograph. Rold Hicker. Web. 6 Sept Photograph. The Cell Cycle. Delano High School. Web. 6 Sept