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.
B) phenotypic characteristics are determined by interactions among several genes.
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