Alpha Thalassemia Beta Thalassemia Father Unaffected Silent Carrier Thalassemia Trait Abnormal gene in cis position Thalassemia Trait Abnormal gene in trans position Hemoglobin H Disease Mother Unaffected Silent Carrier Thalassemia Trait Abnormal gene in cis position Thalassemia Trait Abnormal gene in trans position Hemoglobin H Disease Check × Know more about Alpha Thalassemia Father Unaffected Thalassemia Trait / Minor / Carrier Thalassemia Major Mother Unaffected Thalassemia Trait / Minor / Carrier Thalassemia Major Check × Know more about Beta Thalassemia Minor