BIO120H1 Lecture Notes - Lecture 18: Genetic Drift, Gene Flow, Island
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BIO120H1 Full Course Notes
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Suggested that winds get in way of deep diving for sea birds. Shorter wings are more advantageous for hunting fish. Variability in rat snakes: different colours and patterns in certain ranges, abrupt boundaries between different colour forms, geographically structured. Probably to do w/ substrate background and predation on snake no convincing studies. The fisher-wright debate: made mathematical models for evolution, wright saw an important role for population structure and genetic drift in evolution, most populatio(cid:374)s are(cid:374)"t huge. Structured across landscape and vary in size: geographical population structure played important role in evolution. Fisher disagreed and argued that most evolution occurred in large populations by natural selection: most adaptive change occurred in small populations. Small populations not important in evolutionary process went extinct: wrong in refuting that population structure and small populations. N vs s facing slopes: n vs s facing slopes have different microclimates. Lecture 18: population structure, gene flow & genetic drift.
