A wild- type organism and a genetic variant both have a gene encoding a receptor producing a chemotactic response to metabolite A. The genetic variant has a mutation in a regulatory gene for expression of the receptor. Which of the following statements with respect to the receptor is CORRECT?
A) The organisms have the same receptor genotype but different phenotypes.
B) The phenotypes of both organisms are the same, but the genotypes differ.
C) The genotypes and phenotypes of both organisms are the same.
D) The organisms have different genetic sequences for the receptor.
E) The answer cannot be determined from the information provided.

Question

Quizplus · Accepted Answer

The organisms have the same receptor genotype because the mutation is in a regulatory gene, not in the gene encoding the receptor itself. However, the mutation affects the expression of the receptor, leading to different phenotypes.

A Wild- Type Organism and a Genetic Variant Both Have