Exam2_2013KEY_FINAL_new_PDF

Yet in heterogametic sexually reproducing populations

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Unformatted text preview: the new population is 1.6 inches. 9a. What is the selection differential on bill length in this hummingbird population (2 points)? S = 0.25 9b. What is the response to selection on bill length in this hummingbird population (2 points)? R = 0.1 9c. What is the narrow ­sense heritability of bill length in this hummingbird population (3 points)? R = h2S h2 = R/S 7 ECOL 335 Evolutionary Biology NAME_____KEY________________ Sect#_____ Exam 2 Spring 2013 March 6, 2012 h2 = 0.1/0.25 h2 = 0.4 C. Provide a short definition/answer/description of the following. (Pick 2 of the 3 choices offered, the first 2 will be graded if you answer all 3) 10. What is the “good genes” hypothesis of female choice (4 points)? Under this hypothesis, females choose males that can provide high quality genetic material to their offspring. To do that they choose based on male characters that are costly (expensive to be produced and maintained). Those characters should thus be honest reflections of the genetic quality of the male. Exaggerated traits are thus expected to be more expensive to produce and maintain for low quality males than for high quality males. 11. Please define the coefficient of relatedness, r (4 points)? Probability that alleles of the same gene in two different individuals are identical by descent. 12. If one male can inseminate all gamete...
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This note was uploaded on 02/02/2014 for the course ECOL 335 taught by Professor Reinthal during the Spring '10 term at University of Arizona- Tucson.

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