The Sex Ratio of Mutation Rates of Sex‐linked Recessive Genes in Man With Particular Reference to Duchenne Type Muscular Dystrophy

Summary Following a lead given by Haldane (1956), data on sex‐linked recessive Duchenne type muscular dystrophy, reported from Northern Ireland, Northumberland and Durham and Utah, have each been examined by three methods in an attempt to estimate the sex ratio of the mutation rates. Critical examination of both the available data and the methods suggest that there is no evidence at present to support an hypothesis of a sex difference in the mutation rates.