back mutation


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back mutation

n.
A reversal process whereby a gene or other nucleotide sequence that has undergone mutation returns to its previous state.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

back mutation

n
(Genetics) genetics the reversion of a mutant to the original phenotype
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Since this class is unlikely to be recreated by back mutation, the "ratchet" clicks one notch.
However, in a large sexual population, a low frequency of beneficial, compensatory, or back mutation may be adequate to prevent the eventual entry into a mutational meltdown.
Each locus mutates from a wild-type to a deleterious allele at rate [Mu]; back mutation is assumed to be negligible.