NEET BIOLOGY

Detailed explanation-1: -HbSS. People who have this form of SCD inherit two genes, one from each parent, that code for hemoglobin “S.” Hemoglobin S is an abnormal form of hemoglobin that causes the red cells to become rigid, and sickle shaped. This is commonly called sickle cell anemia and is usually the most severe form of the disease.

Detailed explanation-2: -Thalassemia is a blood disorder passed down through families (inherited) in which the body makes an abnormal form or inadequate amount of hemoglobin. Hemoglobin is the protein in red blood cells that carries oxygen. The disorder results in large numbers of red blood cells being destroyed, which leads to anemia.

Detailed explanation-3: -People who have sickle cell disease inherit two faulty hemoglobin genes, called hemoglobin S-one from each parent. A person has sickle cell trait when the hemoglobin S gene is inherited from only one parent and a normal hemoglobin gene-hemoglobin A-is inherited from the other.

Detailed explanation-4: -Sickle cell anemia is a form of the inherited blood disorder, sickle cell disease. Sickle cell anemia changes your red blood cells’ shape, turning round flexible discs into stiff and sticky sickle cells that block blood flow.