A new genetic study has identified the genes involved in the biological process that determines whether we are left-handed or right-handed . Specifically, British and Dutch scientists have found a relationship with the laterality of the human hand and a network of genes involved in the moment when the embryo stops being a ball of cells and becomes an organism with a differentiation between the side right (dominant in 90% of humans) and left, which is also manifested in a difference between the cerebral hemispheres. According to the study authors in the journal PLOS Genetic , the key lies mainly in the PCSK6 gene .
In fact, by interrupting the expression of this gene in mice during their experiments, left-right asymmetry defects occurred, such as an abnormal placement of organs in the body, such as the location of the heart and stomach on the right and the liver. on the left. However, as William Brandler, co-author of the work, warns, it is most likely that "the development of laterality derives from a mixture of genetics, environment and cultural pressure to tend to be skilled ."
