DILUTION EFFECTS IN CERTAIN EYE COLORS 



457 



White-eosin compound vermilion 



« 

 These females were produced in the cross of eosin vermilion 



females to white vermilion males in order that the sons might 



be eosin vermilion males for comparison. As we had suspected, 



the colors of the daughters and sons were identical : 



Pi 



eosin vermilion 9 X w^ v 

 white vermilion d' X w v 



X w^ 



White-eosin compound vermilion heterozygous for pink 



When eosin vermiUon females are mated to white vermilion 

 pink males the daughters are white-eosin compounds vermilion 

 heterozygous for pink, and the males are eosin vermiUon heterozy- 

 gous for pink. As in the experiment (page 456) where eosin 

 vermilion males heterozygous for pink were produced, these sons 

 were lighter than the stock eosin vermiUon males. We have 

 seen in the last experiment that the white-eosin compound ver- 

 miUon female is exactly the color of the eosin vermilion male. 

 In this cross the daughters and sons are Ukewise exactly alike 

 in color, but are lighter than in the last cross because here both 

 are diluted, and equally diluted in being heterozygous for pink. 

 They are, then, the color of the males of the Experiment of page 

 456: 



