SHULL REVERSIBLE SEX-MUTANTS 



339 



in family 08119. This series of experiments, like those under 

 case III, was calculated to discover any genetic differences which 



might exist among F 2 hermaphrodites, and the fact that these 

 29 different individuals when crossed with a single female produced 



(Mutant) 



(Mutant) 



vy 



1382 867 3 



FIG. 4. Model pedigree for case IV 



essentially identical results leads to the conclusion that no such 

 genetic differences existed. This conclusion is apparently open to 



