Key points for Chapter 11 1. Conservative site-specific recombination(CSSR: definition consequence, mechanism and examples 2. Transposon and transposition: definitions, consequence, basic structural feature of three principle classes of transposable elements, and the mechanism of viral-like retrotransposons/retrovirusesKey points for Chapter 11 1.Conservative site-specific recombination (CSSR): definition, consequence, mechanism and examples. 2.Transposon and transposition: definitions, consequence, basic structural feature of three principle classes of transposable elements, and the mechanism of viral-like retrotransposons/retroviruses