Answer:
The correct answer would be blood group O.
The blood group of a father is A. So, his genotype would be [tex]I^{A}[/tex]_ ([tex]I^{A}I^{A}[/tex] or [tex]I^{A}i[/tex]).
The blood group of a mother is AB. So, her genotype would be [tex]I^{A}I^{B}[/tex].
The cross would result in the production of offspring with all types of blood groups (A, B, and AB) except O as O is the recessive trait and require homozygous recessive condition ([tex]ii[/tex]).
