OBJECTIVE LIFE SCIENCE
GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What kind of inheritance does skin colour represent?
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sex linked (X linked)
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multiple alleles
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systemic
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polygenic
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Explanation:
Detailed explanation-1: -A polygenic trait is a characteristic, such as height or skin color, that is influenced by two or more genes. Because multiple genes are involved, polygenic traits do not follow the patterns of Mendelian inheritance .
Detailed explanation-2: -Skin color in humans is controlled by 3 genes. Hence it is an example of quantitative inheritance also called polygenic inheritance in which a phenotypic trait is controlled by many genes. Such genes that control many traits are called polygenes or cumulative genes. Thus the correct answer is option D.
Detailed explanation-3: -Human skin color is a “polygenic” trait, meaning multiple gene loci are involved in its expression.
There is 1 question to complete.