The following points highlight the 3 modes of gene transfer and hereditary recombination in bacteria. The modes are: 1. Transformation 2. Transduction 3. Bacterial Conjugation.
Mode # 1. Change:
Historically, the finding of change in germs preceded one other two modes of gene transfer. The experiments carried out by Frederick Griffith in 1928 suggested when it comes to time that is first a gene-controlled character, viz. formation of capsule in pneumococci, might be utilized in a variety that is non-capsulated of germs. The transformation experiments with pneumococci fundamentally resulted in a discovery that is equally significant genes are constructed with DNA.
Within these experiments, Griffith utilized two strains of pneumococci (Streptococcus pneumoniae): one by having a polysaccharide capsule creating ‘smooth’ colonies (S-type) on agar dishes that was pathogenic. (suite…)