If a geneticist describes a trait as being 70% penetrant, what would they mean?
A) The expression of the trait varies by individual
B) It is lethal in 30% of the individuals who have the trait
C) Only 70% of the individuals who carry the trait express the trait
D) The trait is present in 70% of the population

Question

Quizplus · Accepted Answer

Penetrance refers to the proportion of individuals with a particular genotype that actually express the associated phenotype. If a trait is 70% penetrant, it means that 70% of individuals with the genotype will express the trait.

If a Geneticist Describes a Trait as Being 70% Penetrant