about 117 genes;
extreme bobbed phenotype at 18oC; normal at 29oC
Ybbts1, vg[+]/vgunspecified has visible phenotype
Ybbts1, vgunspecified has visible | dominant phenotype
Ybbts1; vgunspecified/+ and Ybbts1; cp1/+ flies have nicked wings at 22oC.
Williamson.