Lecture 5C

Lecture 5C - Student Competition Why Darwin Matters The...

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1/27/09 1 Student Competition Why Darwin Matters? The Division of Biological Sciences, along with Biological Sciences Student Association and the Saltman Quarterly, is excited to challenge students to put their most creative foot forward in illuminating the theme of “Why Darwin Matters.” Entries will be judged on creativity, broad public appeal, and how well the theme is incorporated, with cash prizes going to the top 3 winners! First place will receive $500, second place will receive $250, and third place will receive $100 ! Deadline February 27, 2009 http://www.darwinmatters.ucsd.edu/ Darwin’s birthday Celebration February 12, 12:30 PM Library Walk Which of the following would maintain or increase variation within a population? a. Negative frequency dependent selection b. Genetic drift c. Directional selection d. Stabilizing selection e. All of the above Conservation and Genetic Drift Northern elephant seal ( Mirounga angustirostris ) N = 30,000 Survey of genetic variation - no variation at all at 24 loci Why??
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1/27/09 2 Why no variation?? Reduced by hunting to about 20 individuals in 1890’s
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Lecture 5C - Student Competition Why Darwin Matters The...

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