Until then, the evidence for the existence of a new biological domain had been largely based on studies of small numbers of genes. (genomenewsnetwork.org)
For a very small number of genes, though, people inherit only one working copy; the other copy is turned off, forever silenced. (sciencedaily.com)
One study, to be published online September 11 in Nature Communications, found that a much smaller number of genes than previously believed serve... (sciencenews.org)