Principle of Inheritance and VariationEasyBloom L1

Question

Inheritance of skin colour in humans is an example of :-

Options

A.Polygenic inheritance
B.Mendelian inheritance
C.Monogenic inheritance
D.Pleiotropic gene

Solution

(b) [Key Concept: Polygenic Inheritance — Human Skin Colour] Inheritance of skin colour in humans is an example of POLYGENIC INHERITANCE. Skin colour is controlled by multiple genes (estimated 3-6 gene pairs) that act additively, producing a continuous range of phenotypes from very light to very dark. Each gene contributes incremental amounts of melanin pigment. This explains the wide spectrum of human skin colours observed. Other examples of polygenic inheritance: height, weight, and intelligence in humans.

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