Question on: WAEC Biology - 2018

Two unconscious patients X and Y whose blood group genotypes are AO and AB respectively were transfused with the blood from the same donor . Patient X immediately showed signs of difficulty in breathing while patient Y showed no negative reaction.

Patients X and Y were likely transferred with blood of genotype

A
OO
B
AO
C
BO
D
AA
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Correct Option: C

The blood types A and AB can receive blood from blood types A and O but not B. Hence, if there was a problem after transfusion, it was most likely to be from BO.

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