How is the expression of polygenic traits determined?
A)only by the influence of biological factors
B)by genes at two or more loci
C)by multiple genes at one locus
D)solely by the influence of environmental factors

Question

Quizplus · Accepted Answer

Polygenic traits are determined by the interaction of genes at two or more loci. Multiple genes contribute to the expression of a polygenic trait, and the effect of each gene may be small. Environmental factors may also play a role, but the primary determinant is the genetic makeup of an individual.

How Is the Expression of Polygenic Traits Determined