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NEET 2026
Exam
NEET
Year
2026
Subject
Biology
Chapter
Chapter

NEET 2026 · Biology · Chapter

During a blood typing test, a man's blood sample shows...

During a blood typing test, a man's blood sample shows agglutination with both anti-A and anti-B sera. He marries a woman whose blood shows no agglutination with either sera. Which of the following represents the possible genotypes of their biological children?
A. IAiI^{A}i
B. IBiI^{B}i
C. IAIBI^{A}I^{B}
D. iiii
E. IAIAI^{A}I^{A}

Choose the most appropriate answer from the options given below :

Options

  1. AA and B only
  2. BA, B and C only
  3. CC and D only
  4. DB, D and E only

Correct answer

A. A and B only

Step-by-step solution

The man's blood shows agglutination with both anti-A and anti-B sera, indicating the presence of both A and B antigens. His blood group is AB, and his genotype is IAIBI^{A}I^{B}.

The woman's blood shows no agglutination with either sera, indicating the absence of both A and B antigens. Her blood group is O, and her genotype is iiii.

A cross between the man (IAIBI^{A}I^{B}) and the woman (iiii) produces gametes IAI^{A} and IBI^{B} from the man, and ii from the woman.

The possible genotypes of their biological children are IAiI^{A}i and IBiI^{B}i.

Thus, only genotypes A and B are possible.

Answer: A and B only
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