Question

Three children of a family have blood groups A, AB and B. What could be the geno types of their parents? 

(a) I^A I^B and ii 

(b) I^A 1^O and I^B I^O 

(c) I^B I^B and I^A I^A 

(d) I^A I^A and ii

Answer 1

(b) I^A 1^O and I^B I^O