Opportunities for genetic errors during reproduction are sofrequent that one wonders how any of us turn out healthy. Althoughmany of these errors are inconsequential, and some can beneficiallyincrease human diversity, germ-line mutations underlie risksfor thousands of diseases. Genetic diseases, however, need notbe inherited through the germ line: somatic mutations can arisein discrete cell lineages early in embryonic development orduring postnatal life. The implications of somatic mutationsare best known in the field of oncology. As predicted by RobertWeinberg two decades ago, and elegantly elucidated with regardto colon cancer by Bert Vogelstein, . . . [Full Text of this Article]
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From the Genetics and Molecular Biology Branch, National Human Genome Research Institute (J.M.P), and the Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases (S.E.S.), National Institutes of Health, Bethesda, Md.
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