lis iSef/regatioH of Fecundt'tf/ Factors In Drosoj>/n'/a 



TABLE V. 



Data from Reciprocal Cro^acs of Strains IVnih and Loio in Fecundity. 



Ft, i From Line III, Pair A (liatoli 142), ? From Line IV, Pair (liatL-li ;^0) 



I I 



I 1 I 



H4 flies (14 J s and 20 ? s) 



Pair T Pair I] Pair V Pair .\ Pair 1' Pair Z 



32 70 84 79 35 



' An r-^n r^ r^n 



II II II 



I 



n n 



Ft 28 34 36 86 121 75 141 78 27 64 82 78 



II II II II II II 



J's 24 29 27 116 126 81 124 91 23 76 79 80 



Reciprocal . 



Fr, 1 From Line IV, Pair C (hatch 30), i From Line III, Pair A (hatch 142) 



' J 



from this thirty-nine cultures were started. The progeny of each of 

 the pairs is listed in Table VI. Instead of three simple groups which 



TABLE VI. 



7'A« Record of all the Offspring from one Pair of Flics from 

 Line IV, Pair B, F„ Hatch 82. 



Pair 12 3 4 5 6 7 8 9 10 11 12 13 14 15 



Number 53 19 99 131 74 38 142 76 40 102 57 129 122 59 42 



Pair 16 17 18 19- 20 21 22 23 24 25 26 27 28 29 30 



Number 77 108 112 78 90 60 88 45 87 107 80 62 87 104 64 



Pair 31 32 33 34 35 36 37 38 39 



Number 81 101 81 65 96 84 103 85 82 



might be expected from the previous calculations there are at least 



