Insertion is less than 1 kb upstream of the Bx gene.
BxBG01536 homozygous males have significantly decreased levels of aggression. (P < 0.0001; Male aggression index = 7.25).
BxBG01536 mutant flies (males and females pooled) sleep on average 217.2 minutes longer per 24 hours than wild type flies. No significant difference is seen between the sexes.
Mutants exhibit a quantitative gain of bristles.