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. 2019
Examples from the Web for penetrance
Contemporary Examples of 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
Word Origin for penetrance
C20: from penetr (ant) + -ance, on the model of German penetranz
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
The frequency, under given environmental conditions, with which a specific genotype is expressed by those individuals that possess it, usually given as a percentage.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.