51F;54A
51F;54A
bk1 << M(2)53 << bk2
Homozygous are lethal, heterozygotes are viable but male and females are sterile due to a germline defect. w+ clones can grow to be quite large encompassing hundreds of cells if produced early in development.
Flies are heat shocked by two protocols: in the larval stage and again as adults immediately prior to mating, each time for 1 hour at 37oC or only as adults at 37oC for 45 minutes to 1 hour.
All limits from polytene analysis (FBrf0091061)