STURTEVANT 



135 



Table 17 



f in 



9 Xff^S 



One further type of female was The one mutant infrabar obtained 



tested, namely, bar-infrabar over in- in the series is in agreement with 

 frabar-bar (table 19). the sequence in which bar and in- 



Table 18 



B^Bi 



fB'fu 



9 XfBif^S 



* The double-infrabar and infrabar flies are not entered separately. In the original counts 

 they were separated; but the classification is uncertain at times. 



frabar were supposed to lie in the obtained from a mother carrying a 

 two X chromosomes of the mother; double-type allelomorph in each X, 

 and this mutant is also the only one vet where forked and fused were hetero- 



f^'^fu 



Table 19 



9 X f B'B f„ (5 {1st row), or f f ^ $ (2nd row) 



Females not counted in the mating to B^B male. 



