Heredity And Inheritance

Q: A married couple adopted a male child, A few years later; twin boys were born to them. The blood gro...

The AB parent (IAIB) and the O parent (ii) can produce only A (IAi) or B (IBi) blood group children. They cannot produce an O blood group child (ii). Since the three sons have A+, B+, and O+ blood groups, the child with O+ must be the adopted child. Therefore, the adopted son’s blood group is O positive.

Low Priority

Consistency: 7%

Weightage: 1 / 15 Yrs

High-Yield Trend

2011

Questions
1 MCQs

PYQ 2011

prelims

hard

science-and-technology ID: upsc-201

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 -

O positive

A positive

B positive

Cannot be determined on the basis of the given data

Heredity And Inheritance

High-Yield Trend

Questions 1 MCQs

Official Solution

Questions
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