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On how many loci the genes responsible for skin colour are present?

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in Biology – Class 12 by (271k points)
On how many loci the genes responsible for skin colour are present?

(a) Two

(b) Three

(c) Four

(d) Five

The question was asked by my school teacher while I was bunking the class.

Asked question is from Polygenic Inheritance topic in section Principles of Inheritance and Variation of Biology – Class 12

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Right answer is (b) Three

Best explanation: The three pair of genes which determine the skin colour in humans are present at three different loci and each dominant allele of that gene is responsible for the amount of melanin pigment in the skin.

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