If a lethal mutation occurs in a dominant allele, ____ individuals will die from its effects.
A) only homozygous dominant
B) only heterozygous
C) only homozygous recessive
D) both homozygous dominant and heterozygous
E) both homozygous dominant and homozygous recessive

Question

Quizplus · Accepted Answer

Since the mutation is in a dominant allele, both individuals who are homozygous dominant (having two copies of the dominant allele) and heterozygous (having one copy of the dominant allele and one copy of the recessive allele) will express the lethal mutation and thus be affected by its consequences. Homozygous recessive individuals will not express the mutation as they do not carry the dominant allele.

If a Lethal Mutation Occurs in a Dominant Allele, ____