Which of the following is true about the alleles for hemoglobin in humans?

A

Differences in the DNA sequences of alleles A and S account for the difference in the hemoglobin molecules produced.

B

Individuals with the genotype AA will have misshapen red blood cells.

C

The difference between allele A and allele S is due to changes in the environment.

Alleles are the variants of the gene that can be dominant or recessive. The change in the DNA sequence results in the difference in the haemoglobin molecules.

What is the structure of the haemoglobin?

Haemoglobin is the red blood cell protein that is composed of the four heme groups and a globin molecule. It is present in the tetrahedral structure form and includes four amino acid chains.

The modification of the allele of the haemoglobin will alter the structure like the chain and the tetrahedral structure of the proteins will get modified due to the difference in the sequence of the DNA of the A and S alleles.

Therefore, option A. the molecule of the haemoglobin produced will change.

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