BIOL 103 Lecture Notes - Lecture 10: Genetic Load, Mate Choice, Genetic Variation
19 Apr 2017
School
Department
Course
Professor
Document Summary
Sexual selection: darwin envisioned two distinct forms of sexual selection: Intrasexual selection generally male-male combat for control of females. Polygyny and fitness: a male that secures many breeding partners can have very high relative fitness. In many species, males take extraordinary risks in pursuit of reproductive stress. If a few males gain all the copulations, there would be many unsuccessful males: although the variation is greater, average male fitness is still equal to average female fitness, mans use polygamy. If females prefer a trait carried by a male, genes for the preference will be passed to offspring, and offspring will also inherit the genes for the trait itself: preference of genes and trait genes become linked. In many mating systems, males provide nuptial gifts to females that are of considerable value: glandular secretions (crickets) Female and when hes done he takes the bug away like a fucking savage: other benefits include:
