On the left-sided incidence of the supernumerary digit in heterodactylous fowls

THE following results have been obtained by crossing representatives of certain five-toed with four-toed breeds of Fowls. The breeds chosen were the Silky, Dorking and Faverolle on the one hand and the Old English Game, Wyandotte and Orpington on the other. The proportion of four-toed to five-toed and heterodactylous offspring (birds with five toes on one… CONTINUE READING