Flies subjected to heat shocks have high learning indices immediately and 30 minutes after training, indicating normal learning and memory acquisition in the mutant flies. Memory retention 3 hours after training is impaired.
Mutant females exposed to 37oC for 1 hour show a high frequency of nondisjunction and loss of sex chromosomes in meiosis. This phenotype shows incomplete dominance. Homozygous females exposed to 37oC for 1 hour show reduced viability and low fertility.
Heat treated females show a high frequency of meiotic sex-chromosome nondisjunction.
Under normal conditions, juvenile hormone (JH)-hydrolysing activity in 1 or 6 day old mutant females does not differ from wild type. Mutant and wild-type females exposed to 38oC show a significant decrease in JH-hydrolysing activity compared to control females at 25oC. 1 day old mutant females have lower levels of stress reactivity (calculated as the percent decrease in JH-hydrolysing activity at 38oC relative to normal conditions) than control females. 6 day old mutant females have significantly higher levels of stress reactivity than control females.
Mutation shows no maternal effect. Mutation affects early embryonic thermosensitivity.
Heat shock of 37oC for 1 hour during oogenesis stages 6-14 causes a high frequency of chromosome loss and non-disjunction. Successive action of anoxia and heat shock decreased the frequency of chromosome loss and non-disjunction.
Lethal at 29oC, semi-lethal at 25oC, escapers have a small body.