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The Theory of EvolutionPrinciples, Concepts, and Assumptions$
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Samuel M. Scheiner and David P. Mindell

Print publication date: 2020

Print ISBN-13: 9780226671024

Published to Chicago Scholarship Online: September 2020

DOI: 10.7208/chicago/9780226671338.001.0001

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PRINTED FROM CHICAGO SCHOLARSHIP ONLINE (www.chicago.universitypressscholarship.com). (c) Copyright University of Chicago Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CHSO for personal use.date: 17 September 2021

Traits and Homology

Traits and Homology

Chapter:
(p.84) Five Traits and Homology
Source:
The Theory of Evolution
Author(s):

James O. Mcinerney

Publisher:
University of Chicago Press
DOI:10.7208/chicago/9780226671338.003.0005

Homology has been a contentious topic for discussion for almost 200 years and the debate is ongoing. In its simplest definition, homology means “descended from a common ancestor.” Because of genetic recombination, or the replacement of one kind of character or trait with a different kind that can fulfil the same role, identifying homologs and indeed defining homology in detail is fraught with difficulty. In this chapter, I detail some of the history of the concept and link the concept to its uses in phylogeny reconstruction, developmental biology and networks of gene sharing.

Keywords:   homology, genetic network, developmental biology, recombination, common ancestor, phylogeny reconstruction, gene sharing

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