The recovery and preliminary examination of a temperature sensitive suppressor of thecryptocephalmutant ofDrosophila melanogaster

Abstract

SUMMARYThe recovery of two EMS induced mutations which are dominant suppressors of the lethality ofcryptocephalinDrosophila melanogasterare described. One of these mutationsSu(crc)1is described in detail. It maps very close tocryptocephalat 54·7 on the second chromosome and its suppression of cryptocephal is temperature-sensitive. Temperature shift experiments show that the temperature-sensitive period is from before the pupariation until 12 h post pupariation. The temperature-sensitive period ofSu(crc)1is discussed in relation to the expression ofl(2)crc, head eversion and the timing of pupal chitin synthesis.