somatic mutation

World English Dictionary
somatic mutation
 
n
a mutation occurring in a somatic cell, resulting in a change in the morphology or some other aspect of one part of an organism (usually a plant). It may be maintained by vegetative propagation but not by sexual reproduction

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American Heritage
Medical Dictionary

somatic mutation n.
Mutation occurring in the somatic cells as opposed to the germ cells.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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