penetrance(redirected from Incomplete penetrance)
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The frequency, under given environmental conditions, with which a specific phenotype is expressed by those individuals with a specific genotype.
(Genetics) genetics the percentage frequency with which a gene exhibits its effect
[C20: from penetr(ant) + -ance, on the model of German penetranz]
pen•e•trance(ˈpɛn ɪ trəns)
the frequency, expressed as a percentage, with which a particular gene produces its effect in a group of organisms. Compare expressivity (def. 2).