"An absorbing account of the development of our ideas on the nature of heredity....A fascinating account of how the participants, and bystanders, too, viewed genetics from Mendel until today."--Cell"Will clearly be an important book in the history of 20th century genetics...it will focus attention on an area that has been woefully neglected."--Science"Historians have given short shrift to theories and research in cytoplasmic inheritance.... Sapp has done a great service in bringing this buried history to light....[He] has unearthed much valuable information and posed a host of important new questions." --Isis"A significant addition to the history of 20th Century genetics. . . . Should be read by biologists interested in their theoretical and institutional heritage. . . . Sapp makes excellent use of archival sources, especially the rich unpublished letters in the Ephrussi and Sonneborn papers. . . . This book is an important achievement, moving us a long way towards a balanced history of 20th Century genetics." --The Quarterly Review of Biology"Sapp covers well the development and relations among. . .differing views of cytoplasmic inheritance and his book is useful in bringing them together. It is also useful in bringing out the frustrations that scientists encounter in trying to demonstrate the phenomena they think they have found." --Journal of the History of Medicine"Sapp has written useful and interesting accounts of biological research that has been ignored in other studies of genetics. He covers research in pre-World War II Germany and his descriptions of the work of Sonneborn in the United States and Ephrussi in France are particularly valuable." --Medical History"In this finely researched study, Sapp has rescued many fascinating scientists and their struggles with ideas, institutions, and competitors from the oblivion into which narrowly focused histories of Mendelian genetics have cast them." --American Historical Review