452 



T. H. MORGAN AND C. B. BRIDGES 



In these results the vermiUon pink males (926) and females 

 (1050) differed as did the Fi males and females above. 



A pair of the Fi flies of the first half of this experiment (755 9 9 

 691 cf d") were bred from and gave in F2: 



This last test produced in the same culture females of the 

 ordinary vermilion pink type and females vermilion pink hetero- 

 zygous for eosin. The comparison confirmed the preceding 

 statement. 



Vermilion pink heterozygous for white 



Vermilion pink females mated to white vermilion pink males 

 gave daughters heterozygous for white. These females were 

 lighter than those heterozygous for eosin. The color was in fact 

 nearly a simple yellow. 



Pi 



vermilion pink 9 XWvp 

 white verm, pink cf X w v p 



XWvp 

 P 



