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



Gametes of F. 9 X w^ V p — X w^ v p 

 Gametes ofF2c?Xw®Vp — — p 



F3 males 

 X w*^ V p X w^ V p 



p p 



eosin eos. verm 



pink cf pink cf 



70 71 



72 72 



21 16 



163 159 



White-eosin compound pink 



This female is best compared to the eosin-pink male, for ac- 

 cording to the result obtained with the simple white-eosin com- 

 pound and eosin male, the expectation here is, that these two 

 combinations (X w p — X w^ p and X e^ p — ■ — — p) should be 

 identical in color. Direct comparison is possible if the cross 

 is made by mating an eosin pink female to a white pink male. 

 The results confirmed our belief that the sons and daughters of 

 this cross should be of the same color, namely, that of the stock 

 eosin pink male: 



eosin pink 9 X w'' p — X w** p 

 ^ white pink cf X w p — p 



The converse cross of white pink female to eosin pink male 

 gave daughters like those of the last cross, but white sons: 



Pi 



