Tag Archives | Junk DNA

New Research on “Junk” DNA Raises Questions on Eve of Crucial Court Hearing

Picture: Flickr, Peter Alfred Hess (CC)

It seems that new discoveries about DNA, and our own human genome in particular, are coming more rapidly today. More things seem to exist on a scale of genetic variance, and it was recently found that our so-called “junk DNA” is full of important ramifications for genetic disorders and random mutations that determine our evolutionary fate.

But in a more immediate sense, DNA research may raise dire questions and have important bearing on current legal arguments, such as the Ninth Circuit‘s Haskell v. Harris, a case challenging California’s warrantless DNA collection program.

Via Jennifer Lynch at the Electronic Frontier Foundation:

EFF asked the court to consider ground-breaking new research that confirms for the first time that over 80% of our DNA that was once thought to have no function, actually plays a critical role in controlling how our cells, tissue and organs behave.

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According to DNA, You’re Half-Human, Half-Virus

Frank Ryan writes in New Scientist:
When, in 2001, the human genome was sequenced for the first time, we were confronted by several surprises. One was the sheer lack of genes: where we had anticipated perhaps 100,000 there were actually as few as 20,000. A bigger surprise came from analysis of the genetic sequences, which revealed that these genes made up a mere 1.5 per cent of the genome. This is dwarfed by DNA deriving from viruses, which amounts to roughly 9 per cent.On top of that, huge chunks of the genome are made up of mysterious virus-like entities called retrotransposons, pieces of selfish DNA that appear to serve no function other than to make copies of themselves. These account for no less than 34 per cent of our genome. All in all, the virus-like components of the human genome amount to almost half of our DNA. This would once have been dismissed as mere "junk DNA", but we now know that some of it plays a critical role in our biology. As to the origins and function of the rest, we simply do not know...
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