BIO120H1 Lecture Notes - Lecture 7: Genetic Drift, Gene Flow, Canola
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BIO120H1 Full Course Notes
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Monday, october 2, 2017: wright saw an important role for population structure and genetic drift in evolution, fisher disagreed and argued that most evolution occurred in large populations by natural selection. North- vs. south-facing slopes have different microclimates: different environments in different seasons. Population a group of individuals of a single species occupying a given area at the same time. Tricky to count (e. g. , number of plants in a population since you must account for the plants that are above ground and ones that are still below ground) Migration the movement of individuals from one population to another. Gene flow the movement of genes from one population to another. Note: if there is no gene flow occurring between these 2 populations because they are reproductively isolated, selection and drift will be the only processes that drive the populations apart genetically. If gene flow is very frequent, this acts as a cohesive force that stops these populations from differentiating.
