What will be the blood groups of the children of following matings ?

(a) IA IB x IBIB
(b) IAI° x IAIB
(c) IA IB x IAIB 
(d) I° I° x IAIB.

(b) When a cross is made between I^A I° x I^A I^B, then the two will have blood group A, one will have  AB and one will have blood group B.

(c) When a cross is made between I^A I^B x I^AI^B, then the two individuals will have blood group AB, one will have A blood group  and one will have blood group B.

(d) When a cross is made between I° I° x I^AI^B, then the two individuals will belong to blood group A and two to blood group B.