70 



HEREDITY AND SEX 



bers. Again, the resemblance of the reciprocal cross 

 to one of the combinations for eye color is apparent. 

 In fact, this case can be explained on the same prin- 

 ciple as that used for the flies, except that in birds it is 



P^s^nertts 



T' 



Pjq 40 _ Sex-linked inheritance in fowls. Upper line black Langshan 

 hen and barred Plymouth Rock cock. Second Hue F, barred coc^ and 

 hen. Third line, Fo, three barred (cock, hen, cock) and one black (hen). 

 (Cuts from " Reliable Poultry Journal.") 



