A heritability index of 0.80 suggests what about genetic influence?

A heritability index of 0.80 indicates a strong genetic influence on the trait being studied. Heritability is a measure that estimates the proportion of variation in a trait among individuals in a population that can be attributed to genetic differences. A value of 0.80 suggests that 80% of the variation in the trait is due to genetic factors, leaving only 20% attributable to environmental influences. This high percentage indicates that genetics plays a significant role in determining the trait, supporting the conclusion that there is a strong genetic influence at play.

In this context, lower heritability values would imply less genetic contribution, with values close to zero suggesting minimal or no genetic influence. Therefore, options indicating minimal or moderate genetic influence do not accurately reflect the implication of a heritability index of 0.80.