Those vaguely affordable DNA tests that promise to tell you just how likely you are to be stricken by some horrible and unavoidable genetic affliction in the future? They only look at a tiny fraction of the bits and bobs and bases that make up your genetic code. There's a race on to develop a quick and inexpensive way to sequence a human's entire genome, a process that costs about a million dollars now and takes ages but, via the technique under development at Imperial College London, could be done in a few min
