Part 1 of Essay
One of the worst genetically inherited diseases is . is an inherited blood disorder that occurs when you inherit a hemoglobin S gene from both of your parents. Inheriting one hemoglobin S gene and one normal hemoglobin gene means that you only have the trait, and not the disease. causes chronically low levels of hemoglob ....

Part 2 of Essay
.... 10 to 20 days in the bloodstream, compared to a normal red cell’s life span of 120 days, the “sickled” cells result in chronic anemia (abnormally low levels of red blood cells). is most common in people whose ancestors came from parts of Saudi Arabia, India, Africa, and the Mediterranean region. Persons of South American, Central American, or Cuban origin may be affected also. Health experts estimate that approximately 2 million Americans currently carry the trait, while another 72,000 have the disease. Right no ....