Attempt this previous-year question. The correct option stays hidden until you choose.
A married couple adopted a male child, A few years later; twin boys were born to them. The blood group of the couple is AB positive and O negative. The blood group of the three sons is A positive, B positive, and O positive. The blood group of the adopted son is -
Pick an option to check yourself.
• Correct Answer: A
• AB parent can pass only A or B alleles; O parent passes only O allele. Biological children can only be A or B.
• The O positive child must be adopted since AB × O cannot produce blood group O offspring.
Attempt Prelims MCQs or open Mains questions by paper — then continue the same bank inside the app with visual decks.
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