by Marco Torres,
The human genome is packed with millions of gene switches that reside in bits of DNA that once were dismissed as “junk” but it turns out that so-called junk DNA plays critical roles in controlling how cells, organs and other tissues behave. Cambridge researchers have published a paper proving that four-stranded ‘quadruple helix’ DNA structures — known as G-quadruplexes — also exist within the human genome. The question is, how many DNA strands are human beings capable of possessing? Some geneticists are claiming humans will one day have 12 strands.