A bell-shaped curve of phenotypic variation is indicative of
A) environmental effects on phenotypes.
B) incomplete dominance.
C) multiple alleles.
D) epistasis.
E) more than one of these.

Question

Quizplus · Accepted Answer

A bell-shaped curve of phenotypic variation is indicative of multiple factors influencing the phenotype, including both genetic and environmental factors. Incomplete dominance, multiple alleles, and epistasis can also contribute to variation in phenotype, but none of these explanations solely account for a bell-shaped curve of variation.

A Bell-Shaped Curve of Phenotypic Variation Is Indicative of