PSYC 3100 Lecture Notes - Lecture 14: Phylogenetic Tree, Vestment, Robert Trivers

• School: University of Guelph
• Department: Psychology
• Course: PSYC 3100
• Professor: Don Dedrick

Document Summary

Intra sexual selection - within the sex (males competing with males) Inter sexual selection - across the sexes (females choosing males) What problem did sexual selection solve in evolution have a history. Mating systems for primates, mammals didn"t just come out of no where recently they. Want to gure out how these systems came about from some prior set of circumstances. Sexual reproduction evolved out of asexual reproduction. Let"s go back to the de ning difference between sexually reproducing males and females. Females can"t increase the probability of reproductive success by increasing the number of. Males have many small sex cells and females have a few large sex cells. Males can increase the probability of their reproductive success by increasing their number of mates/copulations. If you are just copulating with the same egg then you can only fertilize that one egg (more mates = more eggs) Promiscuous males mates/copulations (except by a little bit)