Question

Which of the following is incorrect about the graying of coat colour of horse?

(a) The graying is a case of dominant epistasis

(b) The colour of the fur and skin gradually turns grey

(c) The G/G or G/g shows greying

(d) Coat colour of horse with G/- combination will grey irrespective of what was its colour to start with

This question was posed to me in final exam.

My doubt is from Epistasis in section Extension and Deviation from Mendelian Genetic Principles of Cytogenetics

Answer 1

Correct answer is (b) The colour of the fur and skin gradually turns grey

The explanation: The Greying is seen only in the fur colour of the mature horse and not in the coloring of the skin. The rest of the options are correct and fit for the case f dominant epistasis.