BIO 130 Exam 3 Study guide_lect 14-15

BIO 130 Exam 3 Study guide_lect 14-15 - BIO 130 Exam 3...

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BIO 130 Exam 3 STUDY GUIDE Dalrymple Spring 2013 (Ch 25.1-6) In order to be prepared for the exam, you should be able to answer the following questions. You can expect that to see short answer questions about some of these topics on the exam. Therefore, I highly recommend that you practice answering these questions in a clear, concise manner, as you would on an exam. 1. For each type of natural selection (directional, stabilizing, and disruptive), be able to describe how the distribution of a trait and genetic variation in the population is affected. 2. What is a “trait”? How is this related to phenotype? 3. What is a tradeoff? How does this relate to adaptation? Give an example to illustrate this idea. 4. How is sexual selection different from “normal” natural selection? 5. What are the two main ways that sexual selection occurs (in other words, what are the different selection pressures that result in sexually selected traits)? Give examples of the kinds of traits you would expect to be selected in response to each different selection pressure.
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