BIO120H1 Lecture Notes - Lecture 10: African Great Lakes, Coevolution, Sexual Conflict

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22 Sep 2017
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BIO120H1 Full Course Notes
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BIO120H1 Full Course Notes
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The movement of genes across the landscape. To measure: difficult, use neutral genetic markers, frequency of. Most gene flow occurs over a short distance, but a small amount heterozygotes - estimate occurs as far as 1 km. Mutation recombination gene flow genetic drift*when pop. Stochastic processes resulting in loss of diversity. Genetic drift - stochastic changes in allele frequency due to random. Important for adaption-rarely-water hyacinth variation in fecundity & mortality. Founder events = small number of organisms populate a new area. Joint action of genetic drift & natural selection. Origin of a novel trait resulting in adaptive radiation. Carriers of the trait can exploit new resources or sets of habitats. An arms race predicts escalation of armaments over evolutionary. Arms races branch time. this would show up as a preponderance of gains on the phylogeny. Homoplasy = similarity of traits as a result of convergent evolution.

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