An early attempt by William Ernest Castle to unify the laws of Mendelian inheritance with Darwin's theory of speciation invoked the idea that species become distinct from one another as one species or the other acquires a novel Mendelian factor.
Un intento temperán feito por William Ernest Castle de unificar as leis da herdanza mendeliana coa teoría de especiación de Darwin supoñía a idea de que as especies se fan diferentes unhas doutras a medida que algunha das especies adquire un novo factor mendeliano.