junk DNA


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junk DNA

n.
A DNA sequence that is part of a genome and is not known to code for proteins or to regulate the expression of genes. Junk DNA may constitute up to 95 percent of the human genome and is postulated to be involved in the evolution of new genes and possibly the repair of genes.

[From junk.]

junk DNA

n
(Genetics) DNA that consists of repeated sequences of nucleotide and has no apparent function

junk DNA


n.
segments of DNA that have no apparent genetic function.
[1990–95]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.junk DNA - stretches of DNA that do not code for genes; "most of the genome consists of junk DNA"
deoxyribonucleic acid, desoxyribonucleic acid, DNA - (biochemistry) a long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix; associated with the transmission of genetic information; "DNA is the king of molecules"
Translations
nichtkodierende Desoxyribonukleinsäurenichtkodierende DNS
skräp-DNA
References in periodicals archive ?
Also removed was what is popularly termed junk DNA, including base pairs known not to encode for any particular proteins, and "jumping gene" segments known to randomly move around and introduce mutations.
Like the apparently redundant organs of Klingon warriors, even junk DNA can come in very handy at times.
A great portion of organism genomes are composed of junk DNA that their cells must stop from transcribing.
A few years back it would have been considered junk DNA.
Experts only began to realise that junk DNA might have a useful regulatory role in the 1990s.
Jonathan Wells exposes The Myth of Junk DNA (Discovery Institute Press 2011) and shows that contrary to being just evolutionary flotsam and jetsam, much of our non-protein-coding DNA performs essential biological functions.
ROCK/POP Barfly, Kingsway, Cardiff Moments From Landing, Raphaelites, Junk DNA, 7.
Some stereotypes do turn up, like the zealous nun, Sister Chastity, the seductive astrobiologist, Oparna Goshmaulik, and the absent- minded Acharya -- he forgets his wife in the car and advances hypotheses on junk DNA as post- coital chatter with his mistress, Oparna.
Flash forward to a man floundering on stage going 'I thought there was more in this junk DNA routine.
To his geneticist detractors who remind us that the human genome probably contains as few as 25,000 genes, Pinker identifies a wealth of information contained in so-called junk DNA, the non-coding portions of the genome, "whose size, spacing, and composition could have large effects on how genes are expressed.
A study of rodents showed that longer versions of a particular junk DNA sequence were associated with greater pair-bonding and care of offspring.
The remainder is so-called junk DNA that may someday be shown to have biologic merit, but that for now is largely seen as filler that remains in the genome for unknown reasons.