Question

Progeny with blood group 'O' cannot be obtained when

• A. a male with 'A' blood group mates with a female having 'A' blood group
• B. a male with 'B' blood group mates with a female having 'B' blood group
• C. a male with 'O' blood group mates with a female having 'AB' blood group
• D. a male with 'A' blood group mates with a female having' B' blood group

Answer 1

The correct option is C a male with 'O' blood group mates with a female having 'AB' blood group

There are three forms of the gene (alleles) that control the ABO blood group, which are designated as $I^A$,$I^B$ and i.
Progeny with blood group 'O' cannot be obtained in cross
O$\times$AB