PSYC 3100 Lecture Notes - Lecture 14: Operational Sex Ratio, Parental Investment, Polygynandry

• School: University of Guelph
• Department: Psychology
• Course: PSYC 3100
• Professor: Pat Barclay

Document Summary

Experiment of who (female or male) would say yes to date vs apartment vs bed. Men are more willing to go back to the apartment while women say no- same with asking someone to go to bed with you. Some qualitative differences as well (have a girlfriend or boyfriend) Sperm are much much smaller than eggs- the minimal parental investment is much different for males and females for any species. Sex= size of gametes ( female has larger gametes- eggs, and male = smaller - sperm) greater minimal parental investment for women. In females the minimal parental investment for women is 9 months but for males it is maybe 2 min depending on how long he lasts lol. Males are ready to impregnate someone else within an hour. Operational sex ratio = number of males reproductively available to mate vs the number of females reproductive available to mate.