Question

which is due to an abnormal hemoglobin protein? a sickle cell anemia b marfan syndrome c vitamin d-resistant rickets d hemophilia a

Explanation:

Sickle cell anemia is a genetic disorder where the hemoglobin protein is abnormal. This abnormal hemoglobin causes red blood cells to take on a sickle - like shape. Marfan syndrome is related to a defect in the connective tissue protein fibrillin. Vitamin D - resistant rickets is due to problems with phosphate metabolism (related to a gene mutation affecting phosphate re - absorption in the kidneys). Hemophilia A is caused by a deficiency of clotting factor VIII.

Answer:

A. sickle cell anemia