Conjugation - In 1946 Leder berg, a student of Tatum, established in bacteria a process resembling sex. In conjugation there is physical contact between two genetically different bacterial cells of the same or closely related species. This feature distinguishes conjugation from transformation and transduction. A conjugation tube is established between the two conjugants, followed by the transfer of genetic material from one cell (the donor or 'male') to the other (the recipient or 'female')
