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penetrance

   Also found in: Medical, Encyclopedia, Wikipedia 0.01 sec.
pen·e·trance  (pn-trns)
n.
The frequency, under given environmental conditions, with which a specific phenotype is expressed by those individuals with a specific genotype.
penetrance [ˈpɛnɪtrəns]
n
(Life Sciences & Allied Applications / Genetics) Genetics the percentage frequency with which a gene exhibits its effect
[from penetr(ant) + -ance, on the model of German penetranz]
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Munro CS: The phenotype of Darier's disease: penetrance and expressivity in adults and children.
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