F FactorSexConjugation, GeneticExtrachromosomal InheritanceAcridinesEscherichia coliGenetics, MicrobialColiphagesChromosomes, BacterialLactoseDNA, BacterialSex FactorsR FactorsSex CharacteristicsRecombination, GeneticMutationGenesLysogenyCrosses, GeneticLactococcus lactisDrug Resistance, MicrobialPlasmidsDNA, CircularCulture MediaTransduction, GeneticChromosome MappingDNA Restriction EnzymesBacterial ProteinsOperonChromosomesSex ChromosomesSex Determination ProcessesUnsafe SexGenes, BacterialSex WorkersSex DifferentiationSafe SexSex AttractantsSex Determination AnalysisSex DistributionDisorders of Sex DevelopmentSex PreselectionSex Hormone-Binding GlobulinSex CounselingGonadal Steroid HormonesProstitutionHomosexuality, MaleSex EducationRisk FactorsAge FactorsTime FactorsSexual BehaviorRetrospective Studies