Reset selection mark for review whats this question

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Reset Selection Mark for Review What's This? Question 15 of 22 4.0 Points In a species of hermaphroditic snails with non-overlapping generations, shell color is controlled by a single gene with two alleles. Snails that are homozygous for one allele have yellow shells, those homozygous for the other allele have blue shells, and heterozygotes have green shells. You observe that in a nearly endless expanse of snails, 175 million are yellow, 50 million are green, and 25 million are blue (you are very good at counting). If there follows one generation of random mating within the population, how many green snails would you expect to see in the next generation if the population size is the same and there is no selection on shell color? A. 0 B. 4 million C. 32 million D. 40 million E. 50 million F. 80 million
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4/5/13 8:17 PM 2013 Problem Set 1 on Evolution Lectures 1-3 Page 6 of 8 G. 175 million H. The number cannot be estimated Reset Selection Mark for Review What's This? Question 16 of 22 4.0 Points In this same population of snails, if instead of random mating the blue snails only mate with each other, how will this affect the fraction of blue snails in the next generation? Reset Selection Mark for Review What's This? Question 17 of 22 4.0 Points Why is natural selection for HIV resistance an unlikely explanation for worldwide patterns of CCR5-D32 allele frequency? Choose ALL that apply: Mark for Review What's This? Question 18 of 22 4.0 Points In 2008, Stanford researchers published a study of 11 Oceanic cultures describing how natural selection acted on canoe designs. They suggested that natural selection was weeding out inferior designs of functional elements. Which of the following observations would constitute the prerequisites for natural selection in this system? Pick ALL that apply:
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4/5/13 8:17 PM 2013 Problem Set 1 on Evolution Lectures 1-3 Page 7 of 8 Mark for Review What's This?
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