Homozygous sgg32 adults (that have been rescued to adulthood by the addition of sgghs.P coupled with larval and pupal heatshocks), show a lengthening of the locomotor activity rhythm periodicity to 26 hours.
Maximal heat shock of sgghs.P rescues the sgg32 mutant phenotype. Lower heat shock produces bristle hyperplasia expected of a hypomorphic allele, a phenotype similar to that of Nl1N-ts1 when exposed to the restrictive temperature during early pupal periods.