1911] SHULL—REVERSIBLE SEX-MUTANTS 347 
hermaphrodites, they would be in reality of the same genotype as 
their pollen parent, thus offering no exception to the general rule 
that the male parent determines the sexual type of its male 
offspring. 
Both of these hermaphrodites were crossed upon female 08114(4), 
already mentioned in cases IV and VII. No influence of the male 
grandparent appears, as all of the male offspring in these two 
eg Fg 
A 
Fic. 10.—Model pedigree for case IX 
families were hermaphrodites. This result proves that the 2 
hermaphrodites of o8116 were genetic hermaphrodites. One of 
these hermaphrodites was also self-fertilized and gave a progeny 
of a single hermaphrodite, constituting family number 09210. 
It would be rash to draw a conclusion from a family consisting of a 
single individual, and nothing could have been derived from it if 
by chance that individual had been a female. The fact that it was 
hermaphrodite instead of normal male, however, confirms the con- 
clusion that the hermaphrodite parent was a genetic hermaphrodite 
like its own seed parent.. 
Whether these two hermaphrodites owed their hermaphrodite 
character directly to their hermaphrodite mother, or whether it 
