Biology Faculty Books and Book Chapters

Group selection

Group selection

Book Title

The International Encyclopedia of Human Sexuality

Files

Document Type

Book Chapter

Editors

Patricia Whelehan, Anne Bolin

Description

[Chapter Abstract] In evolutionary biology, the theory of group selection posits that natural selection occurs at the group level, and thus can influence the evolution of social traits. Natural selection favors traits that confer a fitness advantage to their bearers in the overall population. In social organisms, traits may be favored in the population by bestowing advantages at the group level. For example, when comparing fitness differences within groups, selfishness always beats altruism. However, as selfishness increases in frequency within a group, the average fitness of a group member will plummet in the overall population compared to individuals within more altruistic groups. Therefore, if groups vary in the proportion of altruists, then the differential contribution of groups to the total gene pool can favor altruism despite their selective disadvantage within each group.

ISBN

9781118896877

Publication Date

4-20-2015

Publisher

John Wiley & Sons, Inc

Disciplines

Biology

Comments

Copyright © 2015 John Wiley & Sons, Ltd.

ORCID ID

0000-0002-4807-4979

DOI

10.1002/9781118896877.wbiehs193

Group selection
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