Viable at 17^oC and 22^oC, but lethal at 29^oC. Effective lethal phase at 29^oC is about 12 hr after pupation. Temperature-sensitive period for lethality begins midway through the third larval instar and ends around pupation. At 22^oC the eye color of males is obviously mutant, whereas homozygous females are virtually indistinguishable from wild type. At 17^oC the eye color of males and females is wild-type. Quantity of pteridines in the eye, testes and Malpighian tubules are altered at 29^oC. Temperature-sensitive period for pigment production in the Malpighian tubules occurs in the egg and first instar larva, and for the eyes and testes after pupation. For eyes the temperature sensitive period begins 52-56 hr after pupation. The effect in the eyes is autonomous. For testes the temperature sensitive period begins 56-60 hr after pupation.

temperature-sensitive lethal