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Q.

How many types of phenotypes are existing for skin color in human population?

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a

9

b

3

c

27

d

7

answer is D.

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Detailed Solution

There are 7 types of phenotypes because three different genes with each gene diallelic influence the skin color. It is influenced by number of recessive or dominant alleles for these three genes present in the genotype. 

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How many types of phenotypes are existing for skin color in human population?