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(C) The correct option is $C$,$aabbcc$. Human skin colour is an example of polygenic inheritance,where three genes $(A, B, C)$ control the trait. Each

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aabbcc

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(C) The correct option is $C$,$aabbcc$. Human skin colour is an example of polygenic inheritance,where three genes $(A, B, C)$ control the trait. Each gene has two alleles,where the dominant alleles $(A, B, C)$ contribute to the production of more melanin (darker skin),and the recessive alleles $(a, b, c)$ contribute to the production of less melanin (lighter skin). The effect of these alleles is cumulative. Therefore,the genotype $AABBCC$ results in the darkest skin colour due to the presence of six dominant alleles. Conversely,the genotype $aabbcc$ results in the lightest skin colour because it lacks all dominant alleles,leading to the minimum production of melanin.

Choose the possible genotype responsible for lightest skin colour in human beings.

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