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How many types of genotype will be obtained in skin colour inheritance? 1.16 2.256 3.64 4.8

Asked by prakhart.278 5th January 2023, 1:44 PM
Answered by Expert

Human skin phenotype is an example of polygenic characteristic which shows continuous variation. Human skin is controlled by six genes each with it's own allele. These alleles control the production of melanin. These genes produces eight different types of gametes and these gametes combine with each other in 64 different ways (genotypes) resulting in a total of seven skin color.

Parents having genotype AABBCC and aabbcc will produce offspring of intermediate colour in the F1 generation, i.e. AaBbCc genotype. In the F2 generation of two triple heterozygotes (AaBbCc x AaBbCc) mate, they will give rise to varying phenotypes ranging from very dark to very light in the ratio 1:6:15:20:15:6:1.

Answered by Expert 6th January 2023, 10:19 AM
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