Research into an unusually high prevalence of a particular set of genes in China has suggested that 1.5 million Chinese men are direct descendants of Giocangga, the grandfather of the founder of the Qing dynasty. Giocangga's extraordinary number of descendants, concentrated mainly in north-east China and Mongolia, are thought to be a result of the many wives and concubines his offspring took. Dr Chris Tyler-Smith, a geneticist working at Britain's Wellcome Trust Sanger Institute, made the finding, based on a study of a set of genes on the male Y chromosome. He told the BBC World Service's Science In Action...