Lecture%20outline,%20PopGen2,%2025Jan

Lecture%20outline,%20PopGen2,%2025Jan - Genetics lectures....

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Lecture outline, Biology 152, 25 January 2010 Population genetics II. In this lecture we ll discuss the assumptions of Hardy-Weinberg equilibrium, and what violations of those assumptions mean for real populations. Ultimately, these factors are the forces that drive evolution in populations. General Topics: I. Hardy-Weinberg assumptions review II. Mutation a. The source of all variation III. Random mating IV. Migration V. Infinite population size a. Drift i. Bottleneck ii. Founder effect VI. Natural Selection a. Directional b. Stabilizing c. Diversifying d. Sexual selection VII. Maintaining variation Below is a question from a Biology 152 exam a couple of years ago. Many students had difficulty answering this question, but all of the information is in the chapter and the Population
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Unformatted text preview: Genetics lectures. From a large mainland population of a hypothetical bird species, two new populations are founded on islands. A single fertile female is blown by a storm to island A, a small remote island with identical habitat to the mainland. A group of 500 individuals disperses to island B, a large island very close to, but much drier than, the mainland. Briefly discuss the relative effects of natural selection, drift, and gene flow on the genetic make-up of these two hypothetical island populations over the next several generations relative to one another and the mainland population....
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