330 



MUTATIONS IN EYE-COLOR OF DROSOPHILA. 



are puzzling. I am inclined to attribute them to differences in the running 



of the bottles, so that delay in hatching affects the results. 



As a 



consequence 



my former experiments fall short of giving the complete number of the Pinks 



It may seem possible that the small number of Pinks in the earlier experiment 

 may have been due to the red females having been fertilized by red males before 

 they were isolated. It was, in fact, with this possibility in view, at that time 

 that I asked Miss Julia Moody to repeat the experiment. The stock bottles were 

 carefully emptied every twelve hours, and only those females used for pairing 

 in which the wings had not yet expanded, and in which the abdomen was still 

 elongated. The results that Miss Moody obtained were substantially the same 

 that I had also obtained, and both results were added together to make the sum 

 total. It seems reasonable, therefore, to conclude that the Pinks used at first 

 were relatively less viable than those used a year later in the present experiments. 



Records of F 2 Reds and Pinks (Moody). 



Bottle 



I 



II 



III 



VI 



VII 



VIII 



IX 



X 



XI 



XII 



XIII 



XIV 



XV 



XVI 



XVII 



XVIII 



XXII 



XXIII 



XXIV 



XXV 



XXVI 



XXVII 



XXVIII 



XXXII 



XXXIV 



XXXVI 



xxxvn 



XXXVIII 



XL 

 XLI 

 XLII 

 XLHI 



9 



& 



Red. 



18 



27 



19 



41 



19 



30 



20 



18 



39 



29 



11 



18 



23 



15 



18 



7 



9 



16 



7 



13 



22 



8 



6 



10 



13 



14 



12 



29 

 14 



13 



6 



11 



7 



14 



6 



1 



15 

 22 

 15 

 21 



7 



Pink. 



3 



1 



7 



7 



16 



2 



Total. 



Red. 



9 

 2 

 2 

 1 

 2 

 5 

 2 

 12 

 3 

 4 

 2 

 4 

 2 

 1 

 1 

 5 

 6 

 3 

 1 

 4 

 2 

 2 



1 

 2 

 2 



3 

 3 

 3 

 1 

 4 



23 



26 



11 



27 



8 



20 



37 



18 



21 



22 



10 



22 



8 



3 



18 



13 



3 



13 



4 



8 



11 



8 



8 



3 



17 



14 



13 



17 



11 



19 



3 



3 



12 



15 

 7 

 7 



17 

 8 

 6 



17 

 5 



Pink 



1 

 1 



1 



6 

 1 

 6 

 9 

 9 

 7 

 4 

 2 



Red. 



Pink 



4 



1 



7 



41 



4 



53 



2 



30 



1 



68 



13 



27 



1 



50 



13 



57 



25 



36 



11 



60 



7 



51 



13 



21 



4 



40 



2 



31 



5 



Proportion of 

 Red to Pink. 



3 



7 



2 



4 

 2 

 2 

 2 



1 



1 

 2 



3 



1 

 1 

 2 



3 



1 

 2 



3 

 4 

 2 

 2 



18 

 36 

 18 

 12 

 29 

 11 

 21 

 33 

 16 

 14 

 13 

 30 

 28 

 25 

 46 

 25 

 32 



9 

 14 

 19 

 29 

 13 



8 

 32 

 30 

 21 

 38 

 12 



3 

 12 



2 

 15 

 10 

 6 

 2 

 8 

 4 



3 

 3 



7 



11 



4 

 2 

 6 

 5 

 2 

 1 

 1 



3 

 5 

 3 

 5 

 6 

 7 

 3 

 6 



Total. 



