26-11 



THE YEAST CELL 



occur because we had finally "cleaned up" the cytoplasm. We were 

 thoroughly surprised to find the results shown in Table 26-5. The 

 mating 557 x 554 is of interest, since the independent segregation 

 of the galactose gene indicates that ratios obtained for the melibiose 

 and maltose genes were not due to illegitimate copulation or self- 

 diploidization. Dr. Doudoroff then proposed and supervised the fol- 

 lowing experiments: 



Table 26-5 

 Irregular Ratios frou '*C2ean'* Stocks 



557 X 

 a g ME MA X 



554 



a G me ma 



1194 g ME MA 1198 G ME MA 



1195 G ME MA 1199 G ME ma 



1196 G me MA 1200 G ma 



1197 G ME MA 1201 G ME MA 



1202 a G MA 



1203 o G ME MA 



1204 a G ME ma 



573 X 571 



aGMEMA x agmema 



1219 G ME MA 



1220 G ME MA 



1221 G ME MA 



1222 G ME ma 



