In this article we will discuss about the definition of conjugation in bacteria. The occurrence of recombination by sexual union was first shown experimentally in 1946 by Joshua Lederberg and E.L. Tatum in E. coli. They took two auxotrophic strains neither of which could grow on minimal medium due to mutation in genes controlling synthesis of vitamins thiamine and biotin, [...]
In this article we will discuss about the presence of F factor in conjugation of bacteria. Bacterial cells may carry besides the main chromosome, one or more small DNA molecules in the cytoplasm called plasmids. Of the various kinds of plasmids, a few are involved in conjugation and are called conjugative plasmids. One such conjugative plasmid is the sex element [...]
The below mentioned article provides notes on conjugation. Note # 1. Role of Surface Protein in Conjugation: Conjugation differs from transformation in the fact that in the former physical contact is established between two different strains through a conjugation tube. The genetic material from the donor cell (male) is transferred to the recipient (female) cell. There are special appendages present [...]