Narrow-sense heritability is defined as the total
A)genetic variation divided by the total phenotypic variation.
B)additive genetic variation divided by the total phenotypic variation.
C)dominance genetic variation divided by the total phenotypic variation.
D)additive genetic variation divided by the total dominance variation.
E)epistatic genetic variation divided by the total dominance variation.

Question

Quizplus · Accepted Answer

Narrow-sense heritability is the proportion of the phenotypic variation that is due to the additive genetic variation. It is calculated by dividing the additive genetic variation by the total phenotypic variation. Therefore, Option B is the correct choice. Option A refers to broad-sense heritability, which includes all sources of genetic variation (additive, dominance, and epistatic). Option C, D, and E are incorrect because they either refer to specific types of genetic variation or combine different types of genetic variation inappropriately.

Narrow-Sense Heritability Is Defined as the Total