Biology
Biology
12th Edition
ISBN: 9780078024269
Author: Sylvia Mader, Michael Windelspecht
Publisher: McGraw-Hill Education
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Chapter 16, Problem 2TS

You are observing a grouse population in which two feathers phenotypes are present in males. One is relatively dark and blends into shadows well, and the other is relatively bright and more obvious to predators. The females are uniformly dark-feathered. Observing the frequency of mating between females and the two types of males, you have recorded the following:

Matings with dark-feathered males: 13 Matings with bright-feathered males: 32 Propose a hypothesis to explain why females apparently prefer bright-feathered males. What selective advantage might there be in choosing a male with alleles that make it more susceptible to predation? What data would help test your hypothesis?

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