284 



CALVIN B. BRIDGES 



TABLE 8 



The B. C. offspring given by the Fi wild-type daughters, from the outcross of a 

 purple male to a vestigial female, when back crossed to purple vestigial males 



TABLE 9 

 Linkage of purple and vestigial with balanced inviability 



Purple 



Vestigial 



Purple vestigial 

 Wild type 



Total 



NON- 

 CROSSOVERS 



1067 



965 



1195 



1339 



4566 



CROSSOVERS 



154 

 151 

 146 



157 



5174 



PER CENT 

 OF CROSSOVERS 



11.8 



