Genetic science may have brought us Dolly the sheep and a map of the human genome, but what does the new genetics mean for patients in today's NHS? How much do your genes influence the colour of your hair or your risk of disease, and how can it help to know? Dr Graham Easton offers a guide to basic genetics and talks to one of a new breed of primary care geneticists who advises GPs and patients on inherited diseases.
Producer Paula McGrath. E MAIL: scirad@bbc.co.uk. Repeated tomorrow 4.30pm