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Not by DesignRetiring Darwin's Watchmaker$
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John Reiss

Print publication date: 2009

Print ISBN-13: 9780520258938

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520258938.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 23 July 2021

Natural Selection and Genetic Drift

Natural Selection and Genetic Drift

Their Role in Evolutionary Change

Chapter:
(p.225) 9 Natural Selection and Genetic Drift
Source:
Not by Design
Author(s):

John O. Reiss

Publisher:
University of California Press
DOI:10.1525/california/9780520258938.003.0009

This chapter explores the fundamental distinction between natural selection and genetic drift, starting from a consideration of how they are measured, and suggests that it may not be as fundamental as Wright suggested. It begins by examining the distinction between natural selection and genetic drift at the most basic, physical level—as part of the standardized variance in rate of increase observed in populations. The chapter then provides a brief historical overview of the origin of the concept of genetic drift in the work of Fisher and Wright. Finally, it examines some of the complexities of molecular evolution, such as hitchhiking, meiotic drive, variable selection, mutational bias, recombinational bias, jumping genes, and horizontal gene transfer.

Keywords:   natural selection, genetic drift, molecular evolution, hitchhiking, meiotic drive, variable selection, mutational bias, recombinational bias, jumping genes, horizontal gene transfer

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