The father of medical genetics, Victor McKusick, died at his home in Towson, Md., on Tuesday. McKusick spent his career at Johns Hopkins University, where he established its medical genetics division and studied the links between genetics and disease, especially Marfan syndrome, dwarfism, and Duchenne muscular dystrophy. He also catalogued all the human genes associated with disease into a book, Mendelian Inheritance in Man. Over his career, McKusick won many awards, including the 1997 Albert Lasker Award and the 2001 National Medal of Science. He was 86.