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penetrance Definition

pen·etrance (peni trəns)

noun

Genetics the degree of regularity with which a gene produces its specific effect in its carriers in a population

Etymology: < penetr(ate) + -ance

penetrance Usage Examples

Preposition: of

  • mutation: However, the penetrance of the major haemochromatosis mutations is not accurately known.
  • gene: The penetrance of the disease gene is ~ 75 % .
  • genotype: The etiology of both conditions could be further complicated by variable penetrance of the various genotypes and the involvement of environmental factors.
  • haemochromatosis: News Stories Very low penetrance of hereditary haemochromatosis Low mortality from untreated haemochromatosis?

Converse of object

  • have: Whether the cat is heterozygous or homozygous for W, the blue eyes and deafness have incomplete penetrance.
  • show: AB - PURPOSE: To identify the mutation in the RB1 gene in a Syrian family showing incomplete penetrance of retinoblastoma ( RB ).
  • decrease: However, decreased penetrance of a particular gene defect cannot be excluded.

Adjective modifier

  • incomplete: Incomplete penetrance refers to absence of disease despite presence of the dominant disease gene.
  • reduced: There is a 50 per cent chance of parents passing on the gene, although with reduced penetrance.
  • variable: A better understanding of the factors that underlie variable penetrance in mutation carriers is needed to augment our ability to counsel individual women.
  • low: Last November, the HFEA launched a public debate on testing embryos for ' lower penetrance ' , late onset genetic disorders.
  • high: All these conditions are ' high penetrance ' - meaning that people who have the gene are extremely likely to develop the condition.
  • Very: News Stories Very low penetrance of hereditary haemochromatosis Low mortality from untreated haemochromatosis?

Modifies a noun

  • gene: Where there are known rare, high penetrance susceptibility genes ( e.g.
  • susceptibility: Where there are known rare, high penetrance susceptibility genes ( e.g.
  • estimate: Therefore, penetrance estimates will tend to be inflated.