Biology 1001A Lecture Notes - Lecture 15: Sexual Selection, Parental Investment, Symmetry In Biology
28 Jan 2020
School
Department
Course
Professor
Document Summary
In many animals, one sex displays costly traits that may reduce survival: traits may help attract mates or compete for mates, sexual selection is all about passing your alleles to the next generation. Intrasexually v. intersexualley selected traits: intrasexually, traits that aid competition in fighting between males, e. g. : antlers: intersexually, traits that help males win the female mates choice, e. g. : male peacock feathers: two groups of traits can interfere with each other. Mating game: highest quality male will win bc they dont have to wait in line, lowest quality female is the loser, in real life, both males and females have the same fitness level in terms of reproductive success. Vi: sexy sons/ a taste for the beautiful (attractive males have attractive sons) What if both sexes invest heavily in parental care: leads to monogamy, e. g. : penguins, humans: leads to both sexes being picky.
