Undeva între 5 și 30% din populația lumii e stângace, dar te-ai întrebat vreodată de ce? O echipă de savanți nemți, olandezi și sud-africani e convinsă că a descoperit cauza.
Se știa de ceva timp că totul pornește de la asimetria exprimării genetice, adică procesul prin care informaţia ereditară stocată într-o genă e utilizată în sinteza unor molecule funcţionale în celule. În fine, și mie mi se pare o limbă străină, dar reținem că e vorba despre un proces asimetric la nivel genetic.
Până de curând, savanții credeau că oamenii se nasc stângaci sau dreptaci în funcție de asimetria exprimării genetice la nivelul creierului, în timpul dezvoltării fetale. Cercetătorii pe care i-am menționat mai devreme au descoperit că, de fapt, responsabilă este asimetria la nivelul măduvei spinării. Ăsta e „plot twist”-ul.
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