Biology NEET Previous Year Question Paper NEET 2020 Previous Year Question Paper Single Correct MCQ
Published on: August 14, 2026

Identify the wrong statement with reference to the gene T that controls ABO blood groups.

A
When I A and I B are present together, they express same type of sugar.
B
Allele 'i' does not produce any sugar.
C
The gene (1) has three alleles.
D
A person will have only two of the three alleles.

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ABO blood groups are controlled by the gene I. The gene 1 has three alleles I A , I B and i, The alleles I A and I B produce a slightly different form of the sugar while allele i does not produce any sugar. Because humans are diploid organisms, each person can possess at the most any two of the three I gene alleles.

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