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Question

Inheritance of ABO blood groups illustrates

A
Euploidy
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B
Polyploidy
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C
Incomplete dominance
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D
Multiple allelism
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Solution

The correct option is D Multiple allelism
Multiple allelism is a non- Mendelian inheritance pattern. Inheritance of ABO blood groups illustrates multiple allelism. Here, a single gene code for an enzyme that is responsible for the addition of sugar residues to a specific glycoprotein on the membrane of red blood cells. Three different alleles of this gene are known. All three alleles have arisen by mutation from a single ancestor. Type A (IA), type B (IB), or type O are the multiple alleles which produce phenotype of type A, type B, type AB, or type O blood.
So, the correct answer is option D.

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