460 T. H. MORGAN AND C. B. BRIDGES 



color is that of the stock eosin vermiUon pink male and as de- 

 scribed is so close'in color to white that one not familiar with the 

 colors would pass it over as white. 



eosin vermilion pink 9 Xw^vp — Xw'^vp 

 ^ white vermilion pink c? X w v p — -p 



Fi female Fi male 



X w® v p X w® v p 



X w V p p 



white-eosin comp. eosin verm, pink cf 

 verm, pink 9 



78 44 



The reciprocal cross gave daughters like the above and white 

 sons for comparison: 



SUMMARY OF OBSERVED EFFECTS 



The preceding results estabhsh that the red eyed fly, hetero- 

 zygous for pink, vermilion, eosin, or white, or any combination 

 of these factors, shows no dilution of the red eye color. 



The pink eyed female, heterozygous for vermilion, eosin, or 

 white or any combination of these factors, shows no dilution of 

 the pink eye color. 



The vermilion eyed fly, heterozygous for pink or eosin (in the 

 female), shows no dilution effect, but when heterozygous for 

 both pink and eosin there is a suggestion of a dilution effect. 



