Table 2. Chromosomal deletions that revert the behavioral bang-sensitive (BS) paralytic phenotype of para^bss1/+ flies.

Deficiency	BS
Wild type	0.00
Df(2R)Exel6285	0.03
Df(3L)ED4502	0.07
Df(3R)ED10639	0.13
Df(3L)ED224	0.19
Df(3L)ED201	0.29
Df(3L)ED4502	0.42
Df(2R)BSC427	0.49
Df(3R)ED5518	0.50
Df(3L)ED4486	0.50
parabss1/+	0.95

Ordinarily, approximately 95% of para^bss1/+ flies show a BS paralytic phenotype: paralysis aftermechanical stimulation. Wild-type flies never show BS paralysis. The number of flies showing BS paralysis is greatly reduced by the deficiency chromosomes listed in the table. Flies tested carried the heterozygous deficiency and were of the general genotype: para^bss1/+; Df/+. In all cases, to control for genetic background, experimental flies were compared directly with sibling control flies arising from the same cross (genotype: para^bss1/+; Balancer/+).