Question

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? 67) ______

A) The organisms have the same receptor genotype but different phenotypes.
B) The organisms have different genetic sequences for the receptor.
C) The phenotypes of both organisms are the same, but the genotypes differ.
D) The genotypes and phenotypes of both organisms are the same.
E) The answer cannot be determined from the information provided

Answer 1

The correct answer is A, where the organisms share the same genotype for the receptor but exhibit different phenotypes due to the mutation in a regulatory gene affecting the receptor's expression.

Step-by-step explanation:

The organisms have the same receptor genotype but different phenotypes. This is because even though the wild-type organism and the genetic variant both carry the gene for the receptor, the mutation in the regulatory gene of the genetic variant will likely affect the expression of that receptor gene, which would alter the phenotype. The genotype, which refers to the genetic code for the receptor protein itself, remains the same in both organisms.

This mutation affects the phenotype of the organism, causing it to have a different response to metabolite A compared to the wild-type organism.Genotype refers to the genetic makeup of an organism, while phenotype refers to the observable characteristics or traits. In this case, both organisms have the same receptor genotype, as they have the gene encoding the receptor