30 



FRIEDA COBB 



TABLE 7 

 Analysis of the FI generation of the cross f. typica C X mut.formosa (a@FF X ot' 



The cultures consist of flat-leaved types only. Of the 389 plants grown to maturity, taken 

 in part from each of the seven cultures, 381 were f. typica, and the remaining 8 were of other 

 flat-leaved types 3 of mut. fallax, 2 of mut. dimorpha, 1 of mut. grisella (an undescribed 

 mutation), and 2 undetermined mutations. 



TABLE 8 



Analysis of the F 2 generation resulting from self-pollination of f. typica plants chosen at random 

 . from the FI generation (see table 7} of the cross f. typica C X mut. formosa (a@FF X a'pff). 



The cultures consist of flat-leaved plants with a small percentage of revolute-leaved plants, 

 considered to have arisen by separate mutations of the a gamete in the presence of the recessive 

 allelomorphs of the Mendelian factors for flatness. 



