BIO120H1 Lecture Notes - Lecture 7: Genetic Drift, Gene Flow, Frequency-Dependent Selection
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BIO120H1 Full Course Notes
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Lecture 7 population structure, gene flow and genetic drift. Wright saw an important role for population structure and genetic drift in evolution. Fisher disagreed and argued and most evolution occurred in large populations by natural selection (did not think it was important in forming adaptations and species) North versus south facing slopes have different microclimates: Leads to differentiation even though populations are relatively close together geographically. Population structure gene flow & genetic drift: geographical variation and the genetic differentiation of populations, gene flow the movement of genes across the landscape. How do we measure this: genetic drift and other stochastic forces. A group of individuals of a single species occupying a given area at the same time. Mark recapture studies to estimate the number in a given area. The movement of individuals from one population to another. The movement of genes from one population to another. Migration is a contributing factor but does not lead to gene flow.
