How many types of genotypes can exist in human population with respect to skin color?

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Detailed Solution

Skin color in man is influenced by three different types of genes. Each dominant allele of a gene imparts one unit of skin color to man. Recessive allele does not impart any color to skin. The number of genotypes exist with respect to skin color is $3^{3}$ = 27. The dominant alleles of these genes are involved melanin synthesis.

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