Henig, Robin Marantz. 2000. The Monk in the Garden: The Lost and Found Genius of Gregor Mendel. Boston, MA: Houghton-Mifflin. A compelling look at the "father of genetics."
Knowles, Michael R. and Peter R. Durie. August 8, 2002. What is cystic fibrosis? The New England Journal of Medicine, vol. 347, p. 439. Researchers were surprised to find that a significant proportion of people with atypical cystic fibrosis do not have mutations in the long-recognized CFTR gene.
Lewis, Ricki. April 1, 2002. A case too soon for genetic testing? The Scientist, vol. 16, no. 7, p. 16. The penetrance of the genotype for hereditary hemochromatosis may be as low as 1 percent, complicating genetic testing.