The amount of enzyme activity in a cell that is homozygous for a mutant allele is 400 units. The amount of enzyme activity in a cell homozygous for the WT allele is 200 units. The amount of enzyme activity in a heterozygote is 300 units. What is the dominance relationship between the WT and mutant allele for the phenotype of amount of enzyme per cell?
A) The WT and mutant alleles show incomplete dominance.
B) The mutant allele is dominant.
C) The WT allele is dominant.
D) The WT and mutant alleles are codominant.
E) It is impossible to determine from the information given.

Question

Quizplus · Accepted Answer

The heterozygote has an intermediate level of enzyme activity (300 units) compared to either homozygote (400 units for the mutant and 200 units for the WT), indicating incomplete dominance.

The Amount of Enzyme Activity in a Cell That Is