The Binsinscy-P{hs-hid}6 chromosome has no dominant lethal effect even at 29[o]C, but displays fully penetrant dominant lethality (due to expression of hid from P{hs-hid}6) when embryos older than 7 hours are subjected to a 1 hour heat shock via immersion of culture vials into a 37[o]C water bath.

The Binsinscy chromosome used to generate Binsinscy-P{hs-hid}6 carries a spontaneous recessive lethal mutation.

In(1)sc^S1Lsc^8R and derivatives carrying this inversion carry two copies of the sc transcription unit, but neither copy is expressed normally, so flies have incompletely penetrant missing or duplicated macrochaetae phenotypes. In other words, the combination of the sc^S1 and sc⁸ alleles on the same chromosome produces mutant phenotypes.