Concept
Horizontal gene transfer
Gene sharing between cells, not offspring
hor-ih-ZON-tul jeen TRANS-fer
High-yield clue
The three routes of horizontal gene transfer are transformation, transduction, and conjugation.
Overview
The movement of genetic material between organisms other than by vertical parent-to-offspring inheritance, occurring by transformation, transduction, or conjugation. It is the central concept for the rapid spread of antibiotic resistance.
Classification
- Non-vertical gene movement
- Transformation route
- Transduction route
- Conjugation route
Lab & identification clues
- Mobile-genetic-element vocabulary
- Recombination-into-recipient concept
- Resistance-gene dissemination vocabulary
Associations
- Rapid antibiotic-resistance spread
- Bacterial genome plasticity
- Cross-species gene sharing
Commonly confused with
- Vertical inheritance
- Spontaneous mutation
Frequently asked questions
What is Horizontal gene transfer?
The movement of genetic material between organisms other than by vertical parent-to-offspring inheritance, occurring by transformation, transduction, or conjugation. It is the central concept for the rapid spread of antibiotic resistance.
What is the high-yield clue for Horizontal gene transfer?
The three routes of horizontal gene transfer are transformation, transduction, and conjugation.
What is Horizontal gene transfer associated with?
Horizontal gene transfer is associated with Rapid antibiotic-resistance spread, Bacterial genome plasticity, and Cross-species gene sharing.
What is Horizontal gene transfer commonly confused with?
Horizontal gene transfer is commonly confused with Vertical inheritance and Spontaneous mutation.
Original microbiology concept summary. Sources checked: OpenStax Microbiology 2e, NCBI Bookshelf Medical Microbiology, and CDC/WHO topic pages where applicable; reviewed 2026-06. Educational only; no diagnosis, treatment selection, infection-control instructions, or specimen-handling guidance.