Which of the following characteristics is true for the control of blood groups in humans?

  • A
    $I^A$ and $I^B$ are two recessive alleles.
  • B
    Three alleles $I^A$,$I^B$,and $i$ are involved.
  • C
    All three alleles $I^A$,$I^B$,and $i$ are homozygous.
  • D
    All three alleles $I^A$,$I^B$,and $i$ are dominant.

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Similar Questions

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

If one parent has blood group $A$ and the other parent has blood group $B$,what blood groups can the offspring have?

$A$ man with blood group $B$ marries a woman with blood group $A$ and their first child has blood group $B$. What is the genotype of the child?

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:

$ABO$ blood grouping is controlled by gene $I$,which has three alleles and shows co-dominance. There are six genotypes. How many phenotypes in all are possible?

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