BIO152H5 Lecture Notes - Lecture 10: Kin Selection, Stabilizing Selection, Directional Selection

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If heritable variation leads to differential success, then evolution results. Evolution: changes in allele frequencies of a population over time. Fitness: the genetic contribution of an individual to subsequent generations relative to the contribution of other individuals in the population. Adaptation: herita(cid:271)le trait that i(cid:374)(cid:272)reases a(cid:374) i(cid:374)dividual"s survival and reproduction in a particular environment relative to individuals lacking that trait. What is meant by success: adaptation includes survival and reproduction. Behaviours, physiological processes that help organisms survive and reproduce in a particular environment: diversity of species. Some groups of organisms are more successful than others in the number. Natural selection of species in that group: nature or the environment determines which individuals in a population are more fit, features. All organisms, selection by environment, no purpose or goal, not predictable: co-evolution: pattern of evolution in which two interacting species reciprocally i(cid:374)flue(cid:374)(cid:272)e ea(cid:272)h other"s adaptatio(cid:374)s over ti(cid:373)e.

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