In man, four phenotypes of blood groups are due to the presence of antigen-$A$ and antigen-$B$ on the $RBC.$ The chromosome that has the gene to control these antigens is
In man, four phenotypes of blood groups are due to the presence of antigen-$A$ and antigen-$B$ on the $RBC.$ The chromosome that has the gene to control these antigens is
- A
$X$-chromosome
- B
$21^{\text {st }}$ chromosome
- C
$9^{\text {th }}$ chromosome
- D
$7^{\text {th }}$ chromosome
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