118 Segregation of Fecundity Factors in Drosophila 



TABLE V. 

 Data from Reciprocal Crosses of Strains High and Lotv in Fecundity. 



Fs c? From Line III, Pair A (hatch 142), ? From Line IV, Pair C (hatch 30) 



I 1 I 



34 flies (14 J s and 20 ? s) 



Pair T Pair U Pair V Pair X Pair Y Pair Z 



Fq 32 70 ^ 84 79 35 72 



r"n r-1 ^^ ^ ^-^ ^^ 



II II II 11 II II 



^7 28 34 36 86 121 75 141 78 27 64 82 78 



II II II II II II 



F^ 24 29 27 116 126 81 124 91 23 76 79 80 



Reciprocal. 



F^ cT From Line IV, Pair C (hatch 30), 2 From Line III, Pair A (hatch 142) 



I I 



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

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



TABLE VI. 



The Record of all the Offspring from, one Pair of Flies from, 

 Line IV, Pair B, F,, Hatch 82. 



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 



