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Junk DNA
(redirected from Non-coding DNA)

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junk DNA (jngk)
n.
DNA that does not code for proteins or their regulation but is thought to be involved in the evolution of new genes and in gene repair, and constitutes approximately 95 percent of the human genome.

Junk DNA
Any long stretch of non-protein-coding DNA that composes 97–98% of the human genome, which has been highly conserved in plant and animal genomes over millions of years. It is now recognised that non-coding DNA determines the differences in transcription rates of genes, which is what makes each of us unique, making junk DNA is a misnomer


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But recent evidence suggests that functional genes can emerge from inactive non-coding DNA - also known as "junk" DNA.
Researchers have found genes that arose from non-coding DNA in flies, yeast, and primates.
In fact, organisms simpler than roundworms, such as single-celled bacteria, carry little non-coding DNA and may have no regulatory RNA at all.
 
 
 
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