CROSSINGOVER IN DROSOPHILA 



175 



.TABLE 14 

 b pr c 



Control. Hatched and bred at 22°C. Nos. 592-606 



February 7.. 

 February 10. . 

 February 12. . 

 February 14. . 

 February 16. . 

 February 18. . 

 February 20. . 

 February 22.. 

 February 24. . 

 February 26. . 

 February 28... 



March 2 



March 4 



March 7 



March 10 



March 12 



March 15 



March 17 



March 19 



March 21 



99 

 130 



107 



108 



101 

 67 



101 

 86 



108 

 92 



101 

 64 

 45 



105 

 55 

 80 

 73 



Cold 9°C. 



Nos. 592, 593, 595 and 596, 597, 598, placed in refrigerator from the 



twenty-first to the twenty-eighth day after mating 



February 28... . 



March 2 



March 4 



March 7 31 3 4 173 127 8 33 5 7.5 21.9 43 



March 10 33 2 4 323 219 21 70 13 10.5 25.7 81 



March 12 36 3 4 316 203 30 69 14 13.9 26.2 79 



March 15 38 2 4 356 221 44 79 12 15.425.3 89 



March 17 40 2 4 241 172 20 42 7 11.2 20.3 60 



March 19 42 2 4 175 119 11 42 3 8.0 25.6 44 



March 21 44 2 3 253 179 17 50 7 9.5 22.5 84 



March 23 47 3 3 222 154 21 41 6 12.2 22.2 74 



March 26 50 3 2 129 101 2 26 1.5 20.2 65 



