Why are humans and apes so different if their genomes are so similar?
Less than 4 per cent of the chimpanzee's genetic code is different from humans - a tally so tiny that some speculate the distinction between primates may lie in just a handful of key genes - perhaps as few as 50 out of 20,000 or so in the human genome.
But a study published on Thursday in Nature, the British science weekly, suggests the truth lies elsewhere.
Put simply, the researchers say it is not the number of genes that counts but the way they operate.
Well, duh.
-- Nora
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