Скачать или смотреть Introduction to Bacteria Part 6 - Sexual Reproduction in Bacteria | Prof Jhilmil Gupta |

Although normally defined, a true sexual reproduction with the formation of a zygote (karyogamy) and subsequent meiosis does not occur in bacteria (in all prokaryotes). Instead, genetic recombination takes place in which genes are transferred from one independent, mature bacterium (donor) to another (recipient). Recombination in bacteria is a one-way DNA transfer from donor to recipient. The first demonstration of genetic recombination in Escherichia coli (bacteria) was achieved by Lederberg and Tatum in 1946.
Transfer of DNA from a donor bacterium to the recipient bacterium takes place in three different ways:
1. Conjugation: Direct transfer between two bacteria temporarily in physical contact.
2. Transformation: Transfer of a naked DNA fragment.
3. Transduction: Bacteriophage-mediated transfer of DNA .