PSYCH 1XX3 Lecture Notes - Lecture 2: Assistive Technology, Genetic Drift, Stabilizing Selection
13 Jun 2016
School
Department
Course
Professor
Document Summary
Adaptation: biological traits that help individual to survive and reproduce in its habitat. Higher mental processes (selective attention, memory encoding, memory retrieval) refer to the adapted function of mental activities. Four basic mechanisms of evolution: natural selection, mutation, genetic drift, and migration. Natural selection: differential survival and reproduction of organisms as the result of the inheritable differences between them. Three essential components: individual differences, different reproduction, and heritability. Stabilizing selection: selection against any sort of departure from the species-typical adaptive design. Some natural selection can be poorly observed by scientists in their lifespan and can be reversed, but others can be permanent and form a potential foundation for diversification of related species. Darwinian fitness: average reproductive success of a genotype relative to other genotypes. Sexual selection: the components of natural selection that acts on traits that influence an organism"s ability to mate. Two subtypes: female choice (peacock), success in combat (elk) Unit 7 species typical behaviors and the comparative approach.
