In pea plants, the color of the flower is either violet or white whereas human skin color shows many gradations. Explain giving reasons how it is possible.

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Solution

The color of the human skin is supposed to be controlled by three different separate genes and their inheritance is known as quantitative inheritance.
There may be seven different allelic combinations in the gametes and is heterozygous for all three genes. So there are 64 different combinations are possible while in color of pea flower is decided by only two different genes the dominant and recessive so it is either violet or white in color.

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