CROSSINGOVER IN DROSOPHILA 



195 



TABLE 1 



No. 1. See No. A — table 5 

 No. 2. See No. A— table 4 



TABLE 2 



Effect of moisture in food on crossing-over 



b pr c 



pi 



NON- 

 CROSS- 

 OVER 



B. Very dry food 



AI 1 

 B II 1 

 2 

 3 

 4 

 Bill 1 

 2 

 3 

 4 

 5 



62 



66 

 52 

 58 

 84 

 127 

 61 

 74 

 42 

 79 



59 



76 

 62 

 68 

 85 

 111 

 58 

 59 

 61 

 80 



19 

 13 

 20 

 20 

 21 

 30 

 18 

 14 

 14 

 20 



15 

 12 

 23 

 21 

 14 

 32 

 19 

 13 

 17 



I!) 



Total. 



160 

 175 

 169 

 185 

 225 

 318 

 167 

 169 

 150 

 214 



1,932 



121 

 142 

 114 

 126 

 169 

 238 

 119 

 133 

 103 

 159 



1,424 



104 



374 



30 



6.9 



20.9 



THE JOURNAL OF EXPERIMENTAL ZOOLOGY, VOL. 24, NO. 2 



