Definition of penetrance in English:
penetrance
noun ˈpɛnɪtr(ə)nsˈpenətrəns
mass nounGenetics The extent to which a particular gene or set of genes is expressed in the phenotypes of individuals carrying it, measured by the proportion of carriers showing the characteristic phenotype.
Example sentencesExamples
- With the exception of the relatively rare high penetrance, single gene disorders, genetic tests differ little from most other medical tests, providing evidence of statistical risk only.
- Because of reduced penetrance, individuals of different genotypes can have the same phenotype.
- The penetrance of these phenotypes was background dependent.
- High penetrance susceptibility genes probably account for no more than 5-10% of cases.
- However, other low penetrance susceptibility genes may exist which may alter individual predisposition to breast cancer.
Origin
1930s: from German Penetranz.