 Heredity, always linked with biological knowledge, has been the topic of interest of Carlos López-Beltrán who shows the transformation of the concept from playing a metaphorical role to acquire a narrative role (1994) and subsequently being conceived in statistical terms (2006). By relating heredity with genetics, Esposito (2017) emphasizes the longstanding relationships between the reductionist view of gene as hereditary unit, the idea of information encoded in DNA, and the prophecies about the power of controlling genetic information. From a structuralist perspective, Lorenzano offers a metatheoretical reconstruction of classical genetics (Balzer and Lorenzano 2000), paying special attention to the Hardy-Weinberg law within population genetics (2014).  Mario Casanueva (1997) explores the relationship among the sexual theory of reproduction, Mendelian genetics, and Mendel’s hybridisation theory. In turn, Juan Manuel Torres (1997, 2002, 2006) focuses on the use of genetic tests in medical practice, and Anna Barahona (2007) considers how different inheritance issues can be represented by genetic maps.