BIOL 2160 Study Guide - Orgasm, Erectile Dysfunction, Prolactin
Document Summary
Although males have more androgens and females have more estrogens and. Sex hormones progesterone, all these hormones are found in both sexes. Chromosomes determine whether fetus develops ovaries or testes = sex determination. Y chromosome: sry gene (sex-determining region on y) If sry gene present gonads are testes. Female is the default set; absence of extra. Can have baby that does not have receptors for the hormones so looks diff than. First 2 weeks: embryo sexually indifferent the sex. Wolffian ducts (precursor to male tract- van deferens) If testes present (due to sry gene), testes secrete: Testosterone and mullerian-inhibiting substance (mis) degeneration of mullerian ducts. These hormones stimulate development of wolffian ducts and. Hormones absent wolffian ducts regress, mullerian ducts develop female; female known later. Embryos developing into males are first, body gives chance for embryo to be. Are open and not attached to ovary, egg is shed into abdominal cavity and egg sucked into oviduct;
