Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 20 - Genes Within Populations - Review Questions - Apply: 3

Answer

C.

Work Step by Step

Reversing the selection should simply reverse the curvature of the graph, switching from one central peak to two peaks at the extremes (C.). A. is wrong since some change must occur, and C. can be eliminated since directional selection, not mentioned here, would be needed to shift the distribution. D. is incorrect for the same reason as C.
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