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Questions  

In man, four phenotypes of blood groups are due to the presence of antigen 'A' and antigen 'B' on the surface of RBCs. The chromosome that has the gene to control these antigens is

a
X-chromosome
b
9th chromosome
c
7th chromosome
d
21th chromosome

detailed solution

Correct option is B

The chromosome that has the gene which controls the blood group types in humans is 9th chromosome.

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