301 
BEHAVIOR OF THE GENE FOR THE MUTANT CURVED OF DROSO- 
PHILA MELANOGASTER IN CROSSES INVOLVING GENES IN 
THE SAME AND OTHER CHROMOSOMES. 
Roscor R. Hynde. 
From the Department of Immunology, School of Hygiene and Publie 
Health, Johns Hopkins University, Baltimore. 
Contents. 
I. Behavior of the curved winged mutant with normal wild stock. 
1. Curved 9 byfwild'*. Chromosome I. 
II. Behavior of curved with bent. Chromosome IV. 
1. Curved 9 by,bent <7. 
Ill. Behavior of curved with spineless. Chromosome III. 
1. Curved 9 byfspineless J. 
2. Spineless 9}by curved! , 
3. Deficiency of the double recessive, curved spineless in crowded 
cultures. 
IV. Behavior of curved with vestigial. Chromosome II. 
1. Vestigial 9 by curved <. 
2. Curved 9 by vestigial <. 
3. Back crosses between the hybrid of curved and vestigial to 
the parent stocks. 
V. Behavior of curved with crosses involving black. Chromosome II. 
1. Black 9 by curved o&. 
2. Curved 2 by black &%. 
3. Curved @ by black, purple curved <7. 
4. Black, purple curved «| by curved 9°. 
5. Crosses involving black, purple, vestigial and curved. 
VI. Summary. 
VII. Literature. 
A wing mutation in Drosophila melanogaster which has proved to be iden- 
tical with curved, a mutant found by Bridges in rudimentary stock, appea red 
in my wild cultures in the latter part of November, 1914. The culture was one 
of a large number of wild stocks that were taken during the fall of 19138 
