CROSSINGOVER IN DROSOPHILA 



207 



TABLE 11 



Effect of temperature on second and third broods 



S' 



S' 



S\ b 



S' I 



k a 



1-2 



No. 1. Control. Female parents hatched at 22°C. 



No. 2. Second broods after ten days at 22°C. 



147A 

 148A 

 150A 

 151A 



96 



97 



113 



107 



24 

 44 

 49 

 43 



II 

 60 

 58 

 52 



Hi 



13 

 22 

 26 



is 

 20 

 18 

 28 



2 

 5 



7 

 1(1 



Total. 



286 

 321 

 364 

 360 



1,331 



180 

 176 

 207 

 198 



761 



65 

 104 

 107 



95 



371 



161 



38 



25.2 

 34.8 

 32.1 

 30.0 



30.5 



14.3 



12.7 

 13.7 

 18.6 



14.9 



No. 3. Female parents hatched at 31.5°C. 



No. 4. Second brood after ten days at 22°C. 



