- the frequency, expressed as a percentage, with which a particular gene produces its effect in a group of organisms.Compare expressivity(def 2).
Origin of penetrance
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for penetrance
“These measures of penetrance are likely artificially high,” says University of Cardiff medical geneticist David Cooper.
If scientists identify 100 individuals with the same mutation, and 75 of them have disease, the penetrance is 75 percent.
- genetics the percentage frequency with which a gene exhibits its effect
C20: from penetr (ant) + -ance, on the model of German penetranz
- The frequency, under given environmental conditions, with which a specific genotype is expressed by those individuals that possess it, usually given as a percentage.