302 



Proceedings of Indiana Academy of Science. 



in Indiana. Twelve curved of botli sexes appeared simultaneously in the 

 culture bottle. The mutant has been kept in pure culture since that time. 

 A number of crosses with mutants known to belong to different chromosome 

 groups are here recorded. 



/. Behavior of the curved irint/cil iiuifdiif with normal icild stock. 

 Vhroniosomc I. 



1. Curved 9 by wildcf . 



A curved wing female bred to tlie normal long wing male produced 18 

 sons and 13 daughters, — all with wings typical of wild stock. These when 

 inbred gave in the F, generation 107 curved and 348 wild tyi>e flies. Table 

 I. Both sexes are affected. This result demonstrates curved to be a reces- 

 sive, non sex-linked mutant giving a Mendelian ratio of approximately 3 to 1. 

 It is evident that the gene for curved is not carried by chromosome I, since 

 it does not show sex -linkage. 



Table I. Fo generation from curved 9 by wildcf . 



//. Bvliuvior of ciirvcil irHli bent. Clironiofionic IV. 

 1. Curved 9 by bent cf. 



Bent is a wing mutant tirst described by MuUer who demonstrated that 

 its gene belongs to Group IV. The curved female by bent male gave all 

 normal flies of the wild type in the Fj generation. These inbred produced in 

 Fj the different classes given in table II. 



Table II. F2 generation from curved 9 by bentc?- 



