Sorry Rosemary, you misunderstood the whole question. Below I am quoting an answer from a clinical laboratory scientist: "There are the blood types A,B, AB, O and the Rh factor of negative or positive. However, the red blood cell has other markers on the surface that make them unique. The Red Blood Cell (RBC) main component is hemoglobin moelcule. Hemoglobin is a conjugated protein. It is a vehicle for the transportation of oxygen and carbon dioxide. Hemoglobinopathies and thalassemias are congenital (genetic) hereditary disorders in which a qualitative (structural) abnormality or a quantitative abnormality results from alterations of the DNA genetic code for one or more globin chains. There maybe partial or complete replacement, addition, or a deletion of one or more amino acids of the globin chains. The reaulsts of a change in the sequence will depend on the amino acids involved and their positions in the molecule. Most are clinically insignificant because they do not demonstrate any physiologic effect. Depending on what part of the world your ancestry comes from, there are certain abnormalities that may occur in that region at a higher incident. For example, the Mediterranean area carries higher incidents of thalassemia (a type of anemias), Africa sickle cell, the list goes on. But remember they are not isolated to any particular race, they maybe found more often in that race." Thus....the laboratory personnel have questioned both myself and my daughter as to "what country are you from?" We did not realize until then that my great grandmother was a "Solomon" and thus our search for our ancestry began.