β-thalassemia is caused by the mutant gene carried by chromosome number 11. It causes the formation of abnormal haemoglobin molecules that result in anaemia.
• Thalassemia - autosomal-linked recessive disease
• Two types- α and β
• α-thalassemia: Chromosome number 16 carries mutant gene
• β-thalassemia: Chromosome number 11 carries mutant gene
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