BIO120H1 Lecture Notes - Lecture 7: Genetic Drift, Phenotypic Plasticity, Allele Frequency
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BIO120H1 Full Course Notes
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Lecture 7 population structure, gene ow & genetic drift. A group of individuals of a single species occupying a given area at the same time. The movement of individuals from one population to another. The movement of genes from one population to another. Key questions for evolutionary studies of variation within populations. E ects of selection, gene ow & genetic drift on population divergence. How do we measure gene ow: di cult to observe and measure, distinguish potential vs. actual, distinguish gamete vs. individual, use experimental approaches, use neutral genetic markers* genetic diversity. *polymorphic neutral genetic variation used to study population processes a ecting. Frequency of heterozygotes = an estimate of gene ow. Most gene ow occurs over a short distance, but a small amount occurs as far as 1 km. E ect of gene ow, local selection & drift on population divergence. Stochastic processes resulting in a loss of diversity.
