Variation in phenotypic expression involves both expressivity and penetrance. Penetrance is
A) the degree to which an allele is expressed individually.
B) the degree to which an allele is dominant.
C) a measure of recombination.
D) the proportion of individuals carrying the allele that show a phenotypic effect.
E) the proportion of the individuals carrying the allele.

Question

Quizplus · Accepted Answer

Penetrance refers to the proportion of individuals carrying a particular allele who exhibit the phenotype associated with that allele. It is a measure of how consistently the genetic trait is expressed among individuals with the genotype.

Variation in Phenotypic Expression Involves Both Expressivity and Penetrance