In polygenic inheritance, phenotypic characters are
A) determined by a double pair of alleles.
B) determined by interactions among several genes.
C) determined by multiple copies of a single gene.
D) always controlled by genes on the same chromosome.
E) determined by the genes on the Y chromosome.

Question

Quizplus · Accepted Answer

In polygenic inheritance, a phenotypic trait is determined by interactions among multiple genes. These genes may be on different chromosomes and the expression of the trait depends on the combined effects of these genes. Therefore, this option is the only correct choice as the others provide inaccurate explanations or are irrelevant to polygenic inheritance.

In Polygenic Inheritance, Phenotypic Characters Are