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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) IA IA and IB IO
(b) IA IB and IB IO
(c) IA IO and IB IO
(d) IA IB and IA IO
Solution
IA IA and IB IO
Possible genotypes should be IAIA and IBIO because these two combinations will produce progeny either with blood group A or blood group AB.
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