Multiple choice Deletions of HBA1 and HBA2 genes pretend to govern most cases of sickle cell anemia hemophilia A thalassemia porphyria chronic myeloid leukemia Reveal answer Fill a bubble to check yourself C Correct answer Explanation Thalassemia is an inherited disease of faulty synthesis of hemoglobin. It is a barely detectable abnormality of blood, to severe or fatal anemia deletions of HBA1 and HBA2 genes pretend to govern most cases of the thalassemia.