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

The gene (I) has three alleles IA, IB and i.  A person with genotype  IAIB will have both antigens 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.