PSY 1 Lecture Notes - Heteronormativity, Heterosexuality, Promiscuity
Document Summary
Ova - largest cells in the human body, 1-2 a month released until all run out. Sperm - 40-600 million released per ejaculate. Female - sex that makes the larger parental. Female sex that makes the larger parental investment per gamete. Male sex that makes the smaller parental investment per gamete. Sexual selection a type of natural selection in which members of one sex compete for reproductive access to members of the other sex. The means of competition can be structural or behavioral, and often lead to sexual dimorphism. No current reason for humans - phylogenetic inertia. In most of animal kingdom, females are much bigger than males. One major exception is in species with proportionally large brains. In those species, males compete for females with displays of strength and prowess. Females choose mates based in part on these displays. Males fight so they can mate withdominant female. Structual displays - peacock tail, antlers on bucks, claws on crabs.
