bk1 << pch << Exp6 << bk2 << svr
Fewer cells enlarge in the embryonic ventral neuroectoderm before delamination of the SI neuroblasts compared to wild-type embryos; 33% in the medial, 4% in the intermediate and 11% in the lateral region (wild-type numbers are 63%, 20% and 64% respectively). Prior to the delamination of the SII neuroblasts, when in the wild-type neurectoderm the cells of the intermediate regions enlarge, there is almost no increase in cell size in corresponding regions in Df(1)260-1 embryos.
Df(1)260-1 clones in the wing margin produce bristles with an abnormal morphology.
The bristle phenotype seen female D.simulans/D.melanogaster hybrids is significantly exacerbated by the Df(1)260-1 deletion, which removes the achaete-scute complex.
The ventral cord of hemizygous embryos is strongly fragmented and all external sensory organs of the trunk are missing. Neural hypoplasia of the CNS and PNS are strongly reduced by Scer\GAL4da.G32-mediated expression of l(1)scUAS.cHa.
Df(1)260-1 clones produce normal numbers of olfactory sensilla on the surface of the third antennal segment, although some of these sensilla are smaller than normal and are morphologically abnormal.
Heterozygosity for this deletion has no effect on the mutant ovarian phenotype of ovoD2.
Hemizygous clones in the labellum lack all taste bristles; the taste pegs as well as the pseudotracheal structures are absent.
In heterozygous females the deletion acts as a dominant suppressor of h and emc. All es and most of the nd neurons are removed, ch neurons are not affected.
Lethal in homozygous and hemizygous condition.
male lethal somatic cell viable Germ-line clones lethal (Garcia-Bellido and Robbins, 1983, Genetics 103: 235-47). Eliminates all external sense organs in embryo (Dambly-Chaudiere and Ghysen, 1986, Wilhelm Roux's Arch. Dev. Biol. 195: 222-28).