The term "oligogenic disorder" refers to
A) a trait or disease caused by at least two genes that contribute equally.
B) a trait or disease caused by one major gene and smaller effects of other genes.
C) a trait or disease that affects several body parts.
D) a trait or disease caused by small inputs from many genes, with no major gene.
E) a disorder that ranges greatly in severity.

Question

Quizplus · Accepted Answer

An oligogenic disorder is caused by one major gene with smaller effects of other genes. This differs from a polygenic disorder, which is caused by small inputs from many genes with no major gene.

The Term "Oligogenic Disorder" Refers to