In(2)sytD27/Df(2L)DTD2 transheterozygotes never survive to adulthood.
Heterozygosity for this deletion has no effect on the mutant ovarian phenotype of ovoD2.
Syt1AD4/Df(2L)DTD2 transheterozygotes never survive to adulthood. Syt1AD1/Df(2L)DTD2;P{elav-syt}/+ individuals are more robust than the rescued null alleles: they fly more and climb up the sides of the vial more quickly after being tapped to the bottom.
Mutant phenotype rescued by P element mediated transformation of a wild type copy of dpp.
Ref: Spencer et al., 1982, Cell 28(3): 451--461.