- Data from: Geographic variation in sex-chromosome differentiation in the common frog (Rana temporaria)(2014-06-09) Rodrigues, Nicolas; Merilä, Juha; Patrelle, Cécile; Perrin, Nicolas; University of Lausanne - Rodrigues, Nicolas; University of Helsinki - Merilä, Juha; University of Helsinki - Patrelle, Cécile; University of Lausanne - Perrin, Nicolas