Lab Manual for Biology
Lab Manual for Biology
12th Edition
ISBN: 9781259298516
Author: Sylvia S. Mader Dr.
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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Johnston et al. estimate that 50% of males with the Ho Ho genotype develop scurs (instead of full horns). They also estimate that around 13% of the total male population, at birth, will develop scurs. The males who managed to get access to mating opportunities with females seem to show no preference for whether the females have horns or not. Thus in the adult mating population, mating is random with respect to the genotype at this locus. What is the frequency of the Hop allele in the population?
Populations that are in Hardy-Weinberg equilibrium will display random mating and will be relatively large in size. True False
A population is solely comprised of 152 A2A2 individuals.  7 A1A1 individuals migrate in and contribute to the mating pool.  What is the frequency of A1A2 individuals in the offspring?
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