Animal Diversity 7th Edition

Published by McGraw-Hill Education
ISBN 10: 0073524255
ISBN 13: 978-0-07352-425-2

Chapter 1 - Review Questions - Page 39: 19


Genetic drift is the variation in the relative frequency of different genotypes of a population, including the loss of particular genes if individuals die, do not reproduce, or they just don't get passed on. It occurs in all populations to an extent, but smaller ones are particularly vulnerable as they have less genetic diversity to start with. Over many generations, the loss of genetic variation can be harmful to the success of a species, as the potential genetic responses to environmental change is greatly depleted.

Work Step by Step

Genetic drifts affects all populations, but small ones in particular because they have less genetic variety to begin with.
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