At 25oC, the survival rates of homozygotes are: adult survival - 44%, eclosion - 62%, pupation 67%. At 18oC, the survival rates of homozygotes are: adult survival - 36%, eclosion - 43%, pupation 69%. Ptp69D5 embryos show motor axon defects; 22% of ISNb axons, 6% of ISN axons, 11% of SNa axons and 3% of SNc axons show defects.