PSY 306 Study Guide - Midterm Guide: Sex Reassignment Surgery, Glans Penis, H-Y Antigen
Document Summary
X larger 900-1400 genes ; y smaller 70-400 genes(these genes involved w sexual difs) fertilize egg before x. \ 160 m:100f at fertilization . at birth- 105m:100f : genetic diseases linked to x (female has 2 x, survival chance) and more steps to making men, so more chances to mess up. At reproductive age there is 1:1 ratio: men die after birth bc disease, but also later in life due to risk taking. Later in life, there is more women than men due to : risk taking. And the pleiotropic theory : evolutions favors genes that has positive survival effects early in life, even if it its bad later in life ex: testosterone (linked to prostate cancer later in life) Internal sex organs (xx/xy embryos) - a pair of same gonads & two sets of ducts: (m llerian ducts and wolffian ducts) External genitalia - basic external genitals (tubercle, genital folds, genital swelling) which are from the same tissuesex hormones role.
