gene loss

gene loss

[′jēn ‚lȯs]
(genetics)
Gene elimination from differentiating cells in some protozoans, insects, and crustaceans.
References in periodicals archive ?
Laser captured hepatocytes show association of butyrylcholinesterase gene loss and fibrosis progression in hepatitis C-infected drug users.
We will test hypotheses about: (1) the primary drivers of gene content evolution, (2) the repeatability of patterns in gene loss and retention after WGD, and (3) the early evolution of orphan genes.
U of T Department of Ecology and Evolutionary Biology (EEB) professor Spencer Barrett, co-investigator of a study, said in humans, the Y chromosome has undergone extensive gene loss over its roughly 200-million-year evolutionary history, and now retains only about three per cent of its ancestral genes.
It has been postulated that progressive gene loss, primarily at the terminal ends of the genome, has been a driving force behind the evolution of these viruses (7).
The data revealed two unusual mishaps that occurred in the process of cell division about 27 and 80 million years ago, when an extensive expansion of genes arose from an entire extra copy of the genome, followed by extensive gene loss.
This landmark study revealed massive gene loss across most functional categories as part of a broader picture of severe genome reduction.
Those who did not show ERG/ETV1 genetic aberrations with no PTEN gene loss had excellent prognosis, evidenced by an 85% survival rate after 11 years.
CI may accelerate the rate of tumor suppressor gene loss, and/or actually amplify oncogenes by duplication of the chromosomes on which they are located, contributing to tumorigenesis (Rajagopalan et al.
30) Philippe and Forterre (31) demonstrated that the phylogenies were highly confusing due to the combining effects of gene duplication, gene loss, lateral gene transfer, and tree reconstruction artifacts.
We think that gene loss is still the simplest explanation," says Michael Stanhope of Glaxo-SmithKline in Collegeville, Pa.
Analyses of microbial genomes have further revealed instances of gene duplication, gene loss, and possible horizontal (lateral) transfer of genes from one microbial species (or group) to another.
In domestic livestock, the range of species and breeds within species is greatly diminished, with gene loss due to genetic drift, selection, and economic narrowing (Ch.