Cystinosis is passed on from parents who have a faulty gene, but not the disease itself.
The Sun (2007)
Eight hospitals will initially trial it - to pinpoint a faulty gene that causes high cholesterol.
The Sun (2014)
One in twenty-five Britons carries the faulty gene that causes cystic fibrosis.
Times, Sunday Times (2010)
The map can determine whether the embryo has inherited chunks of chromosome that contain any faulty gene.
Times, Sunday Times (2008)