Skip to main content
Select Source:

penetrance

penetrance The proportion of individuals of a specified genotype who manifest that genotype in the phenotype under a defined set of environmental conditions. If all individuals carrying a lethal mutation die prematurely, then the mutant gene is said to show complete penetrance. An organism may not express the phenotype normally associated with its genotype because of the presence of modifiers, epistatic genes (see epistasis), or suppressors in the rest of the genome; or because of a modifying effect of the environment. Expressivity describes the degree or extent to which a given genotype is expressed phenotypically in an individual.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"penetrance." A Dictionary of Ecology. . Encyclopedia.com. 21 Oct. 2017 <http://www.encyclopedia.com>.

"penetrance." A Dictionary of Ecology. . Encyclopedia.com. (October 21, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/penetrance

"penetrance." A Dictionary of Ecology. . Retrieved October 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/penetrance

penetrance

penetrance The proportion of individuals of a specified genotype who manifest that genotype in the phenotype under a defined set of environmental conditions. If all individuals carrying a lethal mutation die prematurely, then the mutant gene is said to show complete penetrance. An organism may not express the phenotype normally associated with its genotype because of the presence of modifiers, epistatic genes (see EPISTASIS), or suppressors in the rest of the genome; or because of a modifying effect of the environment. Expressivity describes the degree or extent to which a given genotype is expressed phenotypically in an individual.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"penetrance." A Dictionary of Plant Sciences. . Encyclopedia.com. 21 Oct. 2017 <http://www.encyclopedia.com>.

"penetrance." A Dictionary of Plant Sciences. . Encyclopedia.com. (October 21, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/penetrance-0

"penetrance." A Dictionary of Plant Sciences. . Retrieved October 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/penetrance-0

penetrance

penetrance The proportion of individuals of a specified genotype who manifest that genotype in the phenotype under a defined set of environmental conditions. If all individuals carrying a lethal mutation die prematurely, then the mutant gene is said to show complete penetrance. An organism may not express the phenotype normally associated with its genotype because of the presence of modifiers, epistatic genes (see EPISTASIS), or suppressors in the rest of the genome; or because of a modifying effect of the environment. Expressivity describes the degree or extent to which a given genotype is expressed phenotypically in an individual.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"penetrance." A Dictionary of Zoology. . Encyclopedia.com. 21 Oct. 2017 <http://www.encyclopedia.com>.

"penetrance." A Dictionary of Zoology. . Encyclopedia.com. (October 21, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/penetrance-1

"penetrance." A Dictionary of Zoology. . Retrieved October 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/penetrance-1