In familial hypercholesterolemia,individuals with two abnormal alleles die of heart attacks in childhood,those with only one abnormal allele typically die as young adults,and those with two normal alleles have normal life expectancies.This exemplifies __________.
A) penetrance
B) codominance
C) pleiotropy
D) complete dominance
E) incomplete dominance

Question

Quizplus · Accepted Answer

This scenario exemplifies incomplete dominance, where the heterozygous phenotype (one abnormal allele) is intermediate between the two homozygous phenotypes (two abnormal alleles and two normal alleles).

In Familial Hypercholesterolemia,individuals with Two Abnormal Alleles Die of Heart