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But don't worry, scientists say, we can still function normally. One of the astonishing findings of the most comprehensive study of the human genome ever done, is that a sizeable minority of people are walking around with some of their genes missing. But it has no apparent ill-effects! Dr Evan Eichler of the University of Washington is co-author of the study and has been explaining to Bola Mosuro how this is possible. (Picture: Digital illustration DNA structure in colour background; Credit: Thinkstock)