Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups.

The gene (I) has three alleles ${\text{I}}^{\text{A}}$, ${\text{I}}^{\text{B}}$ and i.  A person with genotype ${\text{I}}^{\mathrm{A}}{\text{I}}^{\mathrm{B}}$ will have both antigen A and antigen B that are slightly different forms of sugar while allele i does not produce any sugar. In an individual only two alleles can be present. Therefore, multiple alleles can be found only when population studies are made.