PSYC 211 Chapter Notes - Chapter 10: Gonad, Fetus, Stim
22 Aug 2013
School
Department
Course
Professor
Document Summary
Sexually dimorphic behaviors: differ in males and females, due to hormoens present before/after birth. Production of gametes and fertilization: all cells have 23 pairs of chromosomes, dna w/ genetic info that programs development. Gametes: ove/sperm mature reproductive cell, contain one member of each of 23 pairs. Last pair is sex chromosomes x and y(male). Development of sex organs: y controls development of glands that produce male sex hormones: gonads: testes/ovaries, first to develop, make ova/sperm and secrete hormones. Sry gene makes protein that binds to dna of cells in undifferentiated fetus gonad and causes them to become testes. Hormones effect sexuality in 2 ways: organizational during prenatal (influence development of sex organs/brain, permanent), activational (later in life, activate production of sperm/induce ovulation etc): internal sex organs: bisexual early on, one precursor develops in third month. Wolffian: epididymis, vas deferens, seminal vesicles, develops if hormones secreted by testes.
