A tendency to sudden reversions to the perfect character of either parent would, also, be much more likely to occur with mongrels, which are descended from varieties often suddenly produced and semi-monstrous in character, than with hybrids, which are descended from species slowly and naturally produced.
Guraso bat edo bestearen erabateko ezaugarrira gibelatzeko joerak mestizuetan agertu beharko luke aiseago, sarri bat-batean sorturiko eta munstro-izaerako aldakietatik sortuak baitira, hibridoetan baino, hauek astiro-astiro eta naturalki sorturiko espezieetatik etorriak izaki.