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Vertical transmission of symbionts is the transfer of a microbial symbiont from the parent directly to the offspring. [1] Many metazoan species carry symbiotic bacteria which play a mutualistic, commensal, or parasitic role. [1] A symbiont is acquired by a host via horizontal, vertical, or mixed transmission. [2]
(A) The vertical gene transfer of a toxin-antitoxin system. (B) Horizontal gene transfer of a toxin-antitoxin system. PSK stands for post-segregational killing and TA represents a locus encoding a toxin and an antitoxin. [1] A toxin-antitoxin system consists of a "toxin" and a corresponding "antitoxin", usually encoded by closely linked genes ...
Horizontal gene transfer is a potential confounding factor in inferring phylogenetic trees based on the sequence of one gene. [163] For example, given two distantly related bacteria that have exchanged a gene a phylogenetic tree including those species will show them to be closely related because that gene is the same even though most other ...
An example is the viral transfer of DNA from one bacterium to another and hence an example of horizontal gene transfer. [2] [3] [page needed] Transduction does not require physical contact between the cell donating the DNA and the cell receiving the DNA (which occurs in conjugation), and it is DNase resistant (transformation is susceptible to ...
Vertical gene transfer is the passage of genes from parent to offspring, and horizontal (also called lateral) gene transfer occurs when genes jump between unrelated organisms, a common phenomenon especially in prokaryotes; a good example of this is the acquired antibiotic resistance as a result of gene exchange between various bacteria leading ...
In the spectrum of optimal virulence, vertical transmission tends to evolve benign symbiosis, so is a critical concept for evolutionary medicine. Because a pathogen's ability to pass from mother to child depends significantly on the hosts' ability to reproduce, pathogens' transmissibility tends to be inversely related to their virulence.
Transformation is one of three processes that lead to horizontal gene transfer, in which exogenous genetic material passes from one bacterium to another, the other two being conjugation (transfer of genetic material between two bacterial cells in direct contact) and transduction (injection of foreign DNA by a bacteriophage virus into the host ...
Maintenance of its genome is carried out through vertical gene transfer where specialization of the bacterium allows it to shuttle host sugars directly into its TCA cycle. [ 2 ] Other characteristics of the bacteria include membrane proteins that are useful in the identification of R. rickettsii strains and useful in targeting from antibiotics.