An example of polygenic inheritance in human beings is ___.

Skin colour

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Phenylketonuria.

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Colour blindness

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Sickle cell anaemia

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Solution

The correct option is A
Skin colour

A polygenic inheritance in human beings is skin colour. Polygenic or quantitative inheritance occurs when several genes occupying different loci on the same homologous pairs of chromosomes govern one trait. Inheritance of colour in human beings is an example of polygenic inheritance. The presence of melanin pigment is responsible for skin colour. The more the pigment the darker is the skin.

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