The four children of, two parents each, have different blood group of the ABO series. What were the blood groups of the parents?
Correct answer: B. A and B
- A. A and AB
- B. A and B
- C. A and O
- D. None of these
Explanation
a) A and AB:If one parent has blood type A and the other parent has blood type AB, it is possible for their children to have different blood types of the ABO series. The children could inherit either blood type A or blood type B from the parent with blood type A, and they could inherit blood type A or blood type B from the parent with blood type AB. Therefore, this option is a possible scenario.
This question appeared on the HEC Phase II 2017 paper, which you can sit online with every answer explained.
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