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JAMB Biology 2011 Paper

Question : 39

Total: 48

The number of alleles controlling blood groups in humans

Solution:

Concept:

Human ABO blood groups are controlled by three alleles:

I^A

I^B

, and

i

Explanation:

The ABO blood group system has three alleles:

I^A

produces antigen A,

I^B

produces antigen B,

i

produces no antigen (blood group O).

These three alleles combine in pairs to produce blood groups A, B, AB, and O.

Answer:

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