Conjugation is a mechanism of gene transfer where the cells use a conjugation pilus to transfer DNA between cells. The conjugation pilus is encoded on the F plasmid. 

Conjugation

Transformation is a method of horizontal gene transfer where foreign, naked DNA is taken up by a bacteria. Many bacteria are competent at interacting with environmental DNA and take up DNA. Transformation has been used for genetic engineering purposes with bacteria as well.

Transformation

In transduction, bacteriophages can infect bacteria and move short pieces of DNA from one bacteria to another. This can transfer virulence genes and allow bacteria to be pathogenic. Viral transduction can be used in genetic engineering experiments to add recombinant genes into the chromosomes of bacteria.

Viral Transduction

- Transformation
- Transduction
- Conjugation

University of Wisconsin - Madison

Horizontal gene transfer is the movement of genetic material between organisms other than by the vertical transmission of DNA from parent to offspring. In bacteria, this process is a primary driver for the rapid spread of genetic traits, including antibiotic resistance genes.

Horizontal Gene Transfer

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Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

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Types of Horizontal Gene Transfer

Antibiotic resistance genes are specific genes within a microorganism's DNA that confer the ability to survive exposure to one or more antibiotics. These genes often code for proteins that perform resistance functions, such as enzymes that degrade antibiotics or efflux pumps that remove them from the cell. They can be located on the bacterial chromosome or on mobile genetic elements like plasmids, facilitating their spread through horizontal gene transfer.

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