Abstract
In salivary glands of yellow control stock the puffing pattern in the ecdysone-added artificial C46P medium was on the whole similar to that observed during larval development in vivo. However, underdevelopment of a series of late puffs and a delay in the regression of early puffs were observed. In addition a set of “medium” puffs not visible in vivo appeared. Late puffs differed from those developing in Grace medium.
When salivary glands of homozygotes for the lethal dor lt187, a mutation that causes death in the third instar with no signs of ecdysone induction were incubated with ecdysterone, the development of puffs was restored, i.e., the puffing pattern of mutant cells in vitro practically did not differ from that in cells of the control stock. This implies that the dor lt187 lethal allele belongs to the class of ecdysone-deficient mutations.
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Biyasheva, Z.M., Belyaeva, E.S. & Zhimulev, I.F. Cytogenetic analysis of the X-chromosome region 2B1-2-2B9-10 of Drosophila melanogaster . Chromosoma 92, 351–356 (1985). https://doi.org/10.1007/BF00327466
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DOI: https://doi.org/10.1007/BF00327466