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Sequence No.

BIO-402

Explain polygenic inheritance with the help of an example.
Answer:

The concept of polygenic inheritance was given by Galton in 1833. In this, traits are controlled by three or more genes (multiple gene). Such traits are called polygenic traits.

 

For example, human skin colour is produced by a pigment melanin. The quantity of melanin is due to three pairs of polygenes (A, B and C). If a black (AA BB CC) and white (aa bb cc) individuals marry each other, the offspring shows intermediate colour who are often called Mulatt (Aa Bb Cc). A total of eight alleles combinations are possible in the gametes forming 27 distinct genotype.

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BIO-402

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