Plasmids are extrachromosomal, circular DNA molecules that replicate independently of the bacterial chromosome and play a crucial role in horizontal gene transfer (HGT) among bacteria. Unlike the chromosomal DNA, plasmids can move between cells, allowing the rapid spread of genetic traits, including antibiotic resistance, virulence factors, and metabolic capabilities. HGT mediated by plasmids is a key mechanism in bacterial evolution and adaptation, contributing significantly to biodiversity at the microbial level. One of the primary plasmids involved in HGT is the F (fertility) plasmid. F plasmids carry genes necessary for the formation of a sex pilus, a structure that facilitates the direct transfer of DNA from a donor to a recipient cell in a process called conjugation. Bacteria possessing an F plasmid are designated F⁺, and those lacking it are F⁻. During conjugation, the F⁺ cell forms a pilus and transfers a copy of the F plasmid to the F⁻ cell, converting it into an F⁺ cell capable of