BIO SCI 94 Chapter Notes - Chapter 51: Sociobiology, Mate Choice, External Fertilization

• School: UC-Irvine
• Department: Biological Sciences
• Course: BIO SCI 94
• Professor: Nancy Aguilar- Roca

Document Summary

Internal fertilization is hard to tell, more certain by external fertilization thus males in species where they are certain that offspring are theirs tend to watch offspring more. Intersexual mate choice - when a member from a certain sex gets to choose a mate from another sex. Intrasexual selection - when members from one sex compete for mates. Mate choice by females- typically choose males that have traits that make them seem like they"ll have viable and healthy offspring. Or they have traits similar to their father. Mate- choice copying- choosing traits that other peers are picking. So if your friends want a mate with orang marks, you want a mate with orange marks. Male completion for mates- certain traits are favored, so genetic variation is limited. Inclusive fitness can account for the evolution of behavior, including altruism. Genetic basis for behavior- fru gene"s presence decides whether or not a male fly courts.