**3. Recombination**

Recombination is defined as the production of new DNA molecule(s) from two parental DNA molecules or different segments of the same DNA molecule [11]. Recombination is essential for the success of all living organisms, to generate diversity and to repair damage to DNA. The types of recombination include homologous (general) recombination, nonhomologous (illegitimate) recombination, replicative recombination (transposition) and site-specific recombination.
