1. Donor Cell (F+):
* Contains a fertility factor (F factor): This is a special plasmid that carries genes for the ability to produce a pilus, a protein tube that acts as a bridge between bacteria.
* Forms a pilus: The F+ cell extends the pilus towards a recipient cell.
* Transfers a copy of its F factor: Through the pilus, the F+ cell replicates its F factor and sends a copy to the recipient cell.
2. Recipient Cell (F-):
* Lacks the F factor: The recipient cell is initially unable to produce pili or transfer genetic material.
* Receives the F factor: After receiving the F factor, the recipient cell becomes F+ and can now participate in conjugation.
3. Transfer of other genes:
* Plasmids can carry other genes: Besides the F factor, plasmids can also carry genes for antibiotic resistance, toxin production, or other traits.
* Transfer of additional genes: During conjugation, not only the F factor but also other genes from the donor's plasmid can be transferred to the recipient cell.
Consequences of conjugation:
* Increased genetic diversity: By exchanging genetic material, bacteria can acquire new traits, leading to increased genetic diversity within a population.
* Adaptation to new environments: Conjugation allows bacteria to adapt to new environments, such as acquiring resistance to antibiotics or developing the ability to utilize new food sources.
In summary, during conjugation, bacteria act as:
* Donors: Providing the genetic material (F factor and other genes).
* Recipients: Receiving the genetic material and potentially acquiring new traits.
* Facilitators: Producing pili to form a bridge between cells and allowing for the transfer of genetic information.
