and in this case there is nothing in the external conditions of life to cause the reappearance of the slaty-blue, with the several marks, beyond the influence of the mere act of crossing on the laws of inheritance.
eta kasu honetan, gurutzaketak herentzi legeetan duen eraginaz aparte, ez dago kanpoko bizi-baldintzetan beste ezer arbel-urdinaren berragerpena, goian aipaturiko seinaleekin, sortaraz dezakeenik.