Assume that a mutation occurs in the gene responsible for the production of hexosaminidase A,such that only about 50% of the enzyme activity is found in the heterozygote compared with a homozygous normal individual.If heterozygotes are phenotypically normal,we would say that the mutant allele is ________to its normal allele.
A)gain of function
B)epistatic
C)recessive
D)auxotrophic
E)dominant

Question

Assume that a mutation occurs in the gene responsible for the production of hexosaminidase A,such that only about 50% of the enzyme activity is found in the heterozygote compared with a homozygous normal individual.If heterozygotes are phenotypically normal,we would say that the mutant allele is  ________to its normal allele.
A)gain of function
B)epistatic
C)recessive
D)auxotrophic
E)dominant

Quizplus · Accepted Answer

If heterozygotes are phenotypically normal, it means that the wild-type allele can still produce enough functional protein to compensate for the reduced activity of the mutant allele. This suggests that the mutant allele is recessive to the wild-type allele.

Assume That a Mutation Occurs in the Gene Responsible for the Production