A gene known as HbS was the center of a medical and evolutionary detective story that began in the middle 1940s in Africa. Doctors noticed that patients who had sickle cell anemia, a serious ...

works by removing and inactivating a gene that is normally responsible for producing beta-globin. This replaces HbS in the red blood cells with the unaffected fetal hemoglobin. The second gene ...

A team of scientists at the Harvard Medical School has succeeded in isolating a single gene-the basic unit of heredity. This new technique will allow geneticists to study the detailed operation of ...