How do quantitative traits arise? (Check all that apply.)
A) The trait is controlled only be a single gene and there is no environmental effect on the trait.
B) The trait is polygenic.
C) The trait is controlled by a single gene and the environment.
D) The population is inbred with no environmental effect on the trait.

Question

Quizplus · Accepted Answer

Quantitative traits usually arise from the interaction of multiple genes (polygenic) and the environment. While some quantitative traits may be controlled by a single gene, the effect of the environment on the expression of the gene means that it cannot be considered the sole cause of the trait. Inbreeding may increase the frequency of alleles controlling the trait but will not necessarily impact its quantitative nature.

How Do Quantitative Traits Arise? (Check All That Apply