penetrance

[ pen-i-truh ns ]
/ ˈpɛn ɪ trəns /
|

noun Genetics.

the frequency, expressed as a percentage, with which a particular gene produces its effect in a group of organisms.Compare expressivity(def 2).

Nearby words

  1. peneios,
  2. penelope,
  3. peneplain,
  4. penetrable,
  5. penetralia,
  6. penetrant,
  7. penetrant gene,
  8. penetrate,
  9. penetrating,
  10. penetrating wound

Origin of penetrance

First recorded in 1635–45; penetr(ant) + -ance

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for penetrance



British Dictionary definitions for penetrance

penetrance

/ (ˈpɛnɪtrəns) /

noun

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

Medicine definitions for penetrance

penetrance

[ pĕnĭ-trəns ]

n.

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.