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

Question

Quizplus · Accepted Answer

In polygenic inheritance, phenotypic characteristics are determined by interactions among several genes, rather than just a single gene or pair of alleles. These genes may be located on different chromosomes and may all contribute to the final phenotype in various ways. Examples of phenotypic characteristics that are influenced by polygenic inheritance include height, skin color, and intelligence.

In Polygenic Inheritance