In humans,four phenotypes of blood groups are due to the presence of antigen-$A$ and antigen-$B$ on the $RBC$. The chromosome that carries the gene controlling 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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Similar Questions

$ABO$ blood grouping in humans is controlled by the gene $I$. It has three alleles: $I^A, I^B,$ and $i$. Due to these three different alleles,six different genotypes are possible. How many phenotypes can be formed from these?

The genotypes of a husband and wife are $I^A I^B$ and $I^A I^O$. Among the blood groups of their children, how many different genotypes and phenotypes are possible?

What are the products of the $I^A$ and $I^B$ alleles?

Genes located at the same locus of chromosomes are called

The blood group of Rameshbhai is $B$ and his daughter's blood group is $AB$. What will be the blood group of his wife?

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