Well before a baby is born, the dice have been cast. Boy or girl, tall or short, everything from colour to the risk of getting cancer or heart disease has already been written in the genetic script - the 100,000 genes inherited from mum and dad - what has been called 'The Book of Man'. This vast tome is 100 encyclopaedias long, but written in a genetic alphabet of just four letters. In a massive project that will revolutionise medicine, scientists all over the world have begun deciphering the book's strange text, which reaches to the very roots of human individuality. How will society use such knowledge?
(Ceefax subtitles)