In Labrador retrievers,coat color is governed by two different genes-TYRP1 controls the amount of brown pigment,while MC1R alleles control the color.This type of inheritance is called____.
A) multigenic inheritance
B) codominance
C) incomplete dominance
D) epistasis
E) pleiotropy

Question

In Labrador retrievers,coat color is governed by two different genes-TYRP1 controls the amount of brown pigment,while MC1R alleles control the color.This type of inheritance is called____.  
A) multigenic inheritance
B) codominance
C) incomplete dominance
D) epistasis
E) pleiotropy

Quizplus · Accepted Answer

This type of inheritance is called epistasis, where the expression of one gene is affected by the presence of one or more 'modifier genes'. In the case of Labrador retrievers, the interaction between the TYRP1 and MC1R genes determines the coat color, illustrating an epistatic relationship.

In Labrador Retrievers,coat Color Is Governed by Two Different Genes-TYRP1