Question

A pregnant woman has an equal chance of her baby being blood group A or blood group AB. Which one of the following shows the possible genotypes of the woman and the father of her child?
(a) I^A I^A and I^B I^O
(b) I^A I^B and I^B I^O
(c) I^A I^O and I^B I^O
(d) I^A I^B and I^A I^O

Answer 1

I^A I^A and I^B I^O
Possible genotypes should be I^AI^A and I^BI^O because these two combinations will produce progeny either with blood group A or blood group AB.