GENES MODIFYING NOTCH. 



357 



TABLE 5. X 6 Set continued. 



wing were chosen as parents. Progress was slow, but there are clear 

 indications at the end that the stock was different. Little progress was 

 made until, during the eighth generation, the phenotypic normal 

 females were used as parents. From the ninth to twelfth generation 

 inclusive a marked addition to the phenotypic normal class became 

 evident in most of the cultures. At the end of the selection, males of 

 this stock were bred to females of the other selected line (SS, 162). 



