Fig. 1 Full-eye, bar, ultra-bar, and their heterozygotes. F, full-eye wild 

 females. B, white-bar female of the second generation of low selection from 

 which ultra-bar was derived by mutation (culture no. 144.2). U, ultra-bar fe- 

 male (no. 158.1). Hi, heterozygous female from full X bar. (no. 87.11). H^, 

 heterozygous female from full X ultra-bar (no. 259.3). X 60. 



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