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

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Q.
Identify the wrong statement with reference to the gene ' $I$ ' that controls ABO blood groups. [2020]

1 The gene ( $I$ ) has three alleles.

2 A person will have only two of the three alleles.

3 When $I^{A}$ and $I^{B}$ are present together, they express same type of sugar.

4 Allele $i$ does not produce any sugar

Ans.
(3)

ABO blood groups are controlled by the gene $I$ . The gene $(I)$ 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 possesses any two of the three $I$ gene alleles. When $I^{A}$ and $I^{B}$ are present together they both express their own types of sugars, because of co-dominance.

Solution

Q.
Identify the wrong statement with reference to the gene ' $I$ ' that controls ABO blood groups. [2020]

1 The gene ( $I$ ) has three alleles.

2 A person will have only two of the three alleles.

3 When $I^{A}$ and $I^{B}$ are present together, they express same type of sugar.

4 Allele $i$ does not produce any sugar

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Solution

Q. Identify the wrong statement with reference to the gene 'I' that controls ABO blood groups. [2020]

1 The gene (I) has three alleles.

2 A person will have only two of the three alleles.

3 When IA and IB are present together, they express same type of sugar.

4 Allele i does not produce any sugar

Want Us to Email you About Special Offers & Updates?

Q.
Identify the wrong statement with reference to the gene ' $I$ ' that controls ABO blood groups. [2020]

1 The gene ( $I$ ) has three alleles.

3 When $I^{A}$ and $I^{B}$ are present together, they express same type of sugar.

4 Allele $i$ does not produce any sugar