A heritability index of 0 for a behavioral trait indicates that:
A)the brain has no role in the occurrence of that behavioral trait.
B)genetic variation is not responsible for the individual variation in the occurrence of the trait.
C)changing the environment will not change the likelihood that the trait will occur.
D)the trait is extremely common in a given population.

Question

Quizplus · Accepted Answer

A heritability index of 0 means that genetic variation does not contribute to individual variation in the occurrence of the trait. This does not necessarily mean that the brain has no role in the occurrence of the trait, nor does it mean that changing the environment will not affect the likelihood of the trait occurring. It simply means that genetic factors play no role in explaining differences in the trait between individuals. The trait's prevalence in the population is not necessarily relevant to its heritability index.

A Heritability Index of 0 for a Behavioral Trait Indicates