Pleiotropic genes ____.

A) act on secondary sexual characteristics
B) influence more than one aspect of phenotype
C) are additive
D) produce lethal effects when homozygous
E) are multiple genes that influence one trait

Pleiotropic Genes

Genes that have an effect on multiple, seemingly unrelated phenotypic traits, reflecting the complexity of gene expression in organisms.

Phenotype

The set of observable characteristics or traits of an organism resulting from the interaction of its genotype with the environment.