Phylogeny Notes - 3/20/2009 ANNOUNCEMENTS Quiz # 4 next...

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3/20/2009 1 ANNOUNCEMENTS Quiz # 4 next Monday 3/23/09 Quiz # 4 next Monday 3/23/09; Today’s class notes will include guidelines for Today s class notes will include guidelines for your study; Your in-class work on HWE returned to folders; extra points will be added to your midterm score. Please, clean up your folders!!!! Last time Last time: Objectives: 1 Determine whether evolution occurs Genetic drift; Gene flow 1. Determine whether evolution occurs by mechanisms other than selection. Gene flow. Campbell, Ch. 23, pp.475-485 2. Compare and contrast population Genetic Drift outcomes resulting from selection versus random events. (random events in environment environment) Biological Species Concept: A group of populations capable of interbreeding AND producing viable and fertile offspring Campbell, Ch. 24, pp. 487-492
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3/20/2009 2 Concept check : Clicker Q1: Can gene flow occur between. .. A. ... different species? B. ... different populations of the same species? C. ... different organisms within a population? Objectives 3/20/2009 Objectives, 3/20/2009: 1. Interpret evolutionary relatedness using 1. Interpret evolutionary relatedness using phylogenetic trees. 2. Use phylogenetic analysis to evaluate evidence for evolution. 3. Use phylogeny to explain the erroneous view that evolution is a linear progression view that evolution is a linear progression from primitive to advanced species.
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3/20/2009 3 Divergence, Speciation, Adaptation Adaptation: A trait that makes an individual better suited to its environment will experience better survival and its environment will experience better survival and reproduction differentially “selected” by the environment Will ultimately become prevalent in the population. (Campbell, p. 456) Divergence: Accumulation of genetic change (adaptations) ti i l ti (d t d t ti l ti over time in populations (due to random mutations, selection, drift, flow).
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This note was uploaded on 03/22/2009 for the course BS 100 taught by Professor Taggert during the Spring '08 term at Michigan State University.

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Phylogeny Notes - 3/20/2009 ANNOUNCEMENTS Quiz # 4 next...

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