In the last few years, dramatic advances in molecular biology have made it possible to analyze human genes directly, providing new insights into human molecular pathology and leading to techniques used for such procedures as the prenatal diagnosis of genetic disorders. Written for nonspecialists by an internationally-known expert, the second edition provides not only a clear introduction to the new genetics but also an in-depth consideration of the impact this technology may have on the future practice of medicine. Weatherall describes recombinant DNA techniques and outlines how they are used to analyze genes; reviews what is known about the molecular pathology of human genetic diseases and about acquired disorders like cancer; and assesses how these methods might be used for preventive genetics and gene therapy. Heavily illustrated in two colors, this book will interest physicians, nurses, and counsellors, particularly in obstetrics, pediatrics, general practice and community health.