The entire human genome has finally been sequenced, nearly 20 years after scientists first claimed to have made the breakthrough.In 2003, researchers from the Human Genome Project announced that the blueprint of life had been decoded but they had missed out around eight per cent of DNA, believing it was repetitive and unimportant. Since then experts have come to realise that this" junk DNA" plays a crucial role in human biology, and have finally sequenced the missing pieces-a development that ma