21. DNA Structure
(Category)

... when Johann Friedrich Miescher (1844–1895), a Swiss biochemist, was doing experiments on white blood cells that he obtained from the pus-filled bandages of wounded soldiers in a local hospital. During ...

22. DNA Testing
(Category)

... to assist the diagnosis of such genetic diseases as sickle cell anemia, hemophilia A, Tay-Sachs disease, and phenylketonuria (PKU). Every so often in scientific history a window opens and, suddenly, the ...