Sickle cell disease is caused by a defect in the gene for haemoglobin on which chromosome?
- AThe X chromosome
- BChromosome 21
- CChromosome 7
- DChromosome 11
Show answer and explanation
Correct answer: (d) Chromosome 11
Explanation
The HBB gene on chromosome 11 is affected; it is an autosomal recessive disorder. India aims to eliminate sickle cell disease by 2047.