7() 



HEREDITY AND SEX 



bere. 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 



£11 



'■^zfc-i 



Parents 



T' 



Fig. 40 c-linked inheritance in fowls. Upper line black Langshan 



ben and barred Plymouth Rock cock. Second line, b\, barred cock and 

 hen. Third line, /•'■. three barred (rock, hen, cock) and one black (hen). 

 (Cute fro,,, " Reliable Poultry Journal.") F x and F 2 for color only. 



