Marfan syndrome can be caused by mutations in either of two genes involved in the disorder,but mutations in one of the genes blocks activity of the other.This means that Marfan syndrome demonstrates
A)variable expressivity and complete penetrance.
B)an acquired phenotype.
C)late onset and early onset.
D)genetic heterogeneity and epistasis.

Question

Quizplus · Accepted Answer

Marfan syndrome demonstrates genetic heterogeneity as it can be caused by mutations in either of two genes, and epistasis as mutations in one of the genes can block the activity of the other.

Marfan Syndrome Can Be Caused by Mutations in Either of Two