DILUTION EFFECTS IN CERTAIN EYE COLORS 445 



p pink 9 X W V p — X W V p 

 white verm, pink cf X w v p ■■ p 



Fi females Fi males 

 X W V p X W V p 

 X w V p p 



pink 9 pinkcf 



260 231 



133 102 



393 333 



VERMILION 



So far no dilution effects have been observed in the red or 

 pink. However, we have found that in some of the following 

 series of experiments vermilion shows a slight dilution. 



Vermilion heterozygous for pink 



When vermilion females were mated to vermilion pink males 

 the daughters (75) were vermilion heterpzygous for pink. The 

 color of the eye was indistinguishable from that of stock ver- 

 milion. The sons (78) likewise were indistinguishable from stock 



Vermilion heterozygous for eosin 



The heterozygous females were observed in a cross (page 439) 

 of eosin vermilion males to Fi females out of wild females by 

 eosin vermilion males. The eye color was indistinguishable from 

 o]*dinary vermilion. 



Vermilion heterozygous for white 



Vermilion females heterozygous for white constitute the Fi 

 female class of the cross vermilion females by white vermilion 

 males. They impress one as being slightly brighter than stock 

 vermilion, or their vermilion brothers: 



vermilion 9 X W v — X W v 

 ^ white vermilion cT X w v — 



