Causes of thalassemia

Thalassemia occurs when there’s an abnormality or mutation in one of the genes involved in hemoglobin production. You inherit this genetic defect from your parents............
Ifonly one of your parents is a carrier for thalassemia, you may develop a form of the disease known as thalassemia minor. If this occurs, you probably won’t have symptoms, but you’ll be a carrier of the disease. Some people with thalassemia minor do develop minor symptoms.
If both of your parents are carriers of thalassemia, you have a greater chance of inheriting a more serious form of the disease