Only 8.2% of our DNA does something biologically important, which means that over 90% of the rest may be completely worthless according to geneticists at Oxford University.
Even though the idea of junk DNA emerged in the early 1970s, Alexander Palazzo and T. Ryan Gregory compellingly showed just how useless much of our DNA really is earlier this year.
Also, geneticists Chris Rands and Chris Pointing from Oxford’s Medical Research Council’s Functional Genomics Unit have taken this line of thinking even further by claiming that just 8.2% (~7.1-9.2%) of the human genome is actually functioning in a biologically meaningful way — the code responsible for making us who we are.
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source University of Oxford