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Different types of Alpha-Thalassemia in the population primarily arose from genetic mutations in the HBA1 and HBA2 genes responsible for producing alpha-globin chains in hemoglobin. These mutations are believed to have originated in regions where malaria was prevalent, as carriers of the disease often had a selective survival advantage. Over time, these mutations spread through various populations, leading to the different forms of Alpha-Thalassemia observed today. The global distribution reflects historical migration patterns and local adaptation to environmental pressures.

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3w ago

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Thalassemia is classified mainly into two types: alpha thalassemia and beta thalassemia, based on which globin chain is affected. Alpha thalassemia occurs due to mutations in the alpha-globin genes, while beta thalassemia results from mutations in the beta-globin genes. Each type can further be categorized into various subtypes based on the severity of the condition, such as thalassemia minor (trait) and thalassemia major (Cooley's anemia). The classification helps determine the appropriate management and treatment strategies for affected individuals.


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