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Evolutionary Chance Mutation: A Defense of the Modern Synthesis' Consensus View

Merlin, Francesca (2010) Evolutionary Chance Mutation: A Defense of the Modern Synthesis' Consensus View. Philosophy and Theory in Biology, 2 (201306). pp. 1-22. ISSN 1949-0739

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Abstract

One central tenet of the Modern Evolutionary Synthesis (1930s-1950s), and the consensus view among biologists until now, is that all genetic mutations occur by “chance” or at “random” with respect to adaptation. However, the discovery of some molecular mechanisms enhancing mutation rate in response to environmental conditions has given rise to discussions among biologists, historians and philosophers of biology about the “chance” vs “directed” character of mutations (1980s-2000s). In fact, some argue that mutations due to a particular kind of mutator mechanisms challenge the Modern Synthesis because they are produced when and where needed by the organisms concerned. This paper provides a defense of the Modern Synthesis’ consensus view about the chance nature of all genetic mutations by reacting to Jablonka and Lamb’s analysis of genetic mutations (2005) and the explicit Lamarckian flavor of their arguments. I argue that biologists can continue to talk about chance mutations according to what I call and define as the notion of “evolutionary chance,” which I claim is the Modern Synthesis’ consensus view and a reformulation of Darwin’s most influential idea of “chance” variation. Advances in molecular genetics are therefore significant but not revolutionary with respect to the Modern Synthesis’ paradigm.


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Item Type: Published Article or Volume
Creators:
CreatorsEmailORCID
Merlin, Francescafrancesca.merlin@gmail.com
Keywords: biased chance, chance, darwin, directed mutation, lamarckism, modern synthesis, mutator mechanism, random mutation
Depositing User: Users 15304 not found.
Date Deposited: 13 Jun 2014 16:51
Last Modified: 13 Jun 2014 16:51
Item ID: 10740
Journal or Publication Title: Philosophy and Theory in Biology
Publisher: Michigan Publishing, University of Michigan Library
Official URL: http://dx.doi.org/10.3998/ptb.6959004.0002.003
DOI or Unique Handle: 10.3998/ptb.6959004.0002.003
Date: September 2010
Page Range: pp. 1-22
Volume: 2
Number: 201306
ISSN: 1949-0739
URI: http://philsci-archive.pitt.edu/id/eprint/10740

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