Complex sentence: Beta thalassemias (β thalassemias) are a group of inherited blood disorders caused by reduced or absent synthesis of the beta chains of hemoglobin resulting in variable phenotypes ranging from severe anemia to clinically asymptomatic individuals.
Split into simpler sentences: Beta thalassemias (β thalassemias) are a group of inherited blood disorders. They are caused by reduced or absent synthesis of the beta chains of hemoglobin that result in variable phenotypes ranging from severe anemia to clinically asymptomatic individuals.