Matrimoni misti: implicazioni biologiche

In the process of microevolution, reproductive isolation is the condition that enables genetic differentiation between populations. Such a differentiation is however effectively contrasted by the gene flow generated by migration processes. The genetic variability within the human species is devoid of any substantial discontinuity and as far greater within populations rather than between populations. The sense of belonging to a group does not therefore have biological meaning, even though members of a population may display a certain likeness in their physical appearance due to adaptation to the environment. After this premise, our paper will examine the biological implications of endogamy/exogamy, showing also how surnames can be considered as parameters of biological interaction and used to evaluate the degree of genetic affinity or differentiation between populations, which in turn is related to the extent of migratory/matrimonial exchanges in the past.