PSYCH101 Lecture Notes - Lecture 20: Casual Sex, Asteroid Family, Robert Trivers

• School: University of Waterloo
• Department: Psychology
• Course: PSYCH101
• Professor: Paul Wehr

Document Summary

The only things that the male provides is genes so the female chooses between the best genes (the prettier peacock has the better immune system) Explains why males and females are different. The sex that makes the smaller investment competes for the sex that makes the larger investment: The sex that makes the larger investment will be more choosy when selecting partner(s). Differences in sexual behavior between genders in terms of their obligatory investment into parenthood. Females are often obligated to invest more in parenthood so they are more choosy for whom they reproduce with. The seahorse are opposite because the female only give an egg and the male grows the child in them, and females are more competitive. Choosy females: women make the larger obligatory investment. Body-fat distribution: reproductive success limited by number of successful pregnancies: Females and males are defined by the size of their gametes in all species (females large and male small)