Key words Chromsome Flagella Plasmid Pilus / pili (fimbriae) Transposable Genetic Elements Capsule Is Tn Interon (slime layer, glycocalyx) Phage Spore Lysophage(temperate), virulent phage prophage, lysogen /ysogeny Horizontal gene transfer Transformation Transduction General transduction Specific transduction ysogenIc conversion Conjugation F factor, Hfr, R plasmidKey Words Chromsome Plasmid Transposable Genetic Elements IS Tn Interon Phage Lysophage (temperate), virulent phage prophage, lysogen /lysogeny Horizontal Gene transfer Transformation Transduction General transduction Specific transduction Lysogenic conversion Conjugation F factor，Hfr， R plasmid Flagella Pilus / pili (fimbriae) Capsule (slime layer, glycocalyx) Spore