GENES MODIFYING NOTCH. 



385 



Other X (the Notch-bearing chromosome) must Imvo Uikko.! U-lund at 

 some division with the result that one cell g.,t both X's and the othe 

 cell only one X. "ii«i-i 



In consequence of such a process of chromatin oliminati(,n we ex- 

 pect one part of the individual to be male a.s well a« osin rubv and the 



Fia. 104. 



Fig. 105. 



other part female, red-eyed and notched. An examiniition of Plate 

 4, figure 2 shows that the right side is female, as .seen in the wings, the 

 eye, and the foreleg (absence of sex-comb), and that the left side 

 is male, as seen in the size of the wing, color of eye, and sex-comb. This 

 gynandromorph is not, however, strictly bilateral, for thoupjier posterior 

 corner of the light-colored eye is red, while the tip of the abdomen. 



