Question

Which one of the following is not the case of epistasis?

(a) Fur colour in mouse

(b) Fruit colour in summer squash

(c) Fruit shape in summer squash

(d) Coat colour in labrador

The question was asked during an interview.

This is a very interesting question from Epistasis topic in portion Extension and Deviation from Mendelian Genetic Principles of Cytogenetics

Answer 1

Correct answer is (c) Fruit shape in summer squash

Explanation: White Fur colour in mouse and coat colour in Labrador is the case of recessive epistasis, and Fruit color in summer squash being a case of dominant epistasis, fruit shape of summer squash is gene interaction and not epistasis.