Since Mendel's original experiments on genetic characteristics of greenpeas, the biological sciences have evolved in an apparently unlimited fashion and created information systems on human genetics, whose most complete expression are undoubtedly the Biobanks. Use of human tissue able to revel disease history and individual lifestyle has generated interest in scientists, philosophers, lawyers and other scholars who reflect on the practical and theoretical challenges of this new knowledge. This paper explores ethical difficulties derived from administration of biobanks insofar as their implementation and development imply risks associated to the expression and expansion of contemporary "biopolitics", as conceived by Michel Foucault.