Question

Labrador retrievers’ fur color is controlled by two alleles, E and B. Any dog with the ee__ genotype develops into a yellow lab, while B_E_ dogs become black labs and bbE_ dogs become chocolate labs. This is an example of _____.

a. epistasis

b. codominance

c. incomplete dominance

d. linkage

Short answer

The correct option is A.

Step-by-step solution

Step1. Introduction

In many regions of the world, Labrador Retrievers are still a widely known dog breed. There are three distinguishable colours: black, chocolate, and yellow. Whereas this seems to be a case of epistasis in this question.

Step. 2 Explanation for correct option.

The expression of one gene is altered by that of the articulation about one or more individually shared genes, which is known as epistasis.

Step. 3 Explanation for incorrect option. 

Option b. Codominance describes the phenomenon wherein two alleles are revealed to the same extent inside an organism.

Option c. Incomplete dominance comes out of a cross wherein every parental contribution is separate and distinct, giving rise to children with an intermediate phenotype.

Option d. The close relationship of genes or any other Genetic material on the very same genome is regarded to as linkage.