If there is no phenotypic variation in a trait, then the heritability of that trait will be approximately
A) 1.0.
B) .50.
C) .25.
D) 0.

Question

Quizplus · Accepted Answer

Heritability measures the proportion of variation in a trait that can be attributed to genetic variation among individuals. If there is no phenotypic variation in a trait, it means all observed variation is due to environmental factors, not genetics, making the heritability 0.

If There Is No Phenotypic Variation in a Trait, Then