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| Modern Genetic Analysis Chapter 9. The Genetics of Bacteria and Phages Bacterial Conjugation Figure 9-11. Origin and reintegration of the F factorin this case, F lac. (a) F is inserted in an Hfr strain between the ton and lac+ alleles. (b,c) Abnormal "outlooping" and separation of F occurs to include the lac locus, producing the F-lac+ particle. (d) An F lac+ / lac partial diploid is produced by the transfer of the F-lac particle to an F lac recipient. (From G. S. Stent and R. Calendar, Molecular Genetics, 2d ed. Copyright © 1978 by W. H. Freeman and Company, New York.)

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