BIOLOGY 130 Lecture Notes - Lecture 17: Spermatophore, Red Phalarope, Sexual Selection
Document Summary
Reproductive behavior, mating system, and parenting: bottom line: making babies. Evolution should preserve traits that enhance ability to make babies and grandchildren. Babies must be successful to contribute to future generations. Genes for traits promoting reproduction eventually will predominate. Refers to selection for traits that increase an individual"s. Sexual dimorphism: sexual selection is the answer. Subset of natural selection it"s still all about reproduction: some maximize number of mates, others quality of mates, mating systems. These ones have a large opportunity for sexual selection (winners and losers: darwin proposed two components of sexual selection: Male-male competition for mates (aka mate competition) Members of one sex compete for access to the other sex. Members of one sex choose the other. The basic difference between the sexes is . The size of their gametes: females produce large, immobile, food-rich gametes called eggs, males produce small, mobile gametes called sperm.
