thorax & macrochaeta
Ovarioles in aretQB/aretQB ; Dl9P/+ females form a single large egg chambers with many germline cells. The fusome appears as dots. Most egg chambers have more than 16 germline cells in aretQB/aretPD ; Dl9P/+ ovaries. Three classes of abnormal egg chambers are seen, which are present in roughly equal numbers. In the first class, a large number of germline cells of roughly equal size are enveloped by a single epithelium of follicle cells. The remaining two classes arise from partial fusion of separate cysts; no stalk cells can be detected and the follicle cell layers of different egg chambers remain in contact with each other. In the "anterior/posterior fusion" class, a well-defined linear organisation within individual ovarioles is maintained, and adjacent egg chambers are fused with each other at their anterior and posterior boundaries. In the "random fusion" class, egg chambers are positioned irregularly and can be closely apposed to multiple different egg chambers on lateral as well as on anterior and posterior surfaces. In both the partial fusion classes, each egg chamber contains an oocyte. In the anterior/posterior fusion class the oocyte is present at the posterior of the cyst and in the random fusion class the oocyte is either lateral or posterior relative to the overall polarity of the ovariole.
The addition of Dl9P/+ to Gp150P8/Gp150k11120b animals increases the proportion of mutant ommatidia from 19.2% to 67.6%. The addition of Dl9P/+ to Gp150k11120b/+ animals increases the proportion of mutant ommatidia from 0.19% to 2.7%.
Double mutants with Df(1)sc-B57 have normal midgut epithelium, but the large basophilic midgut cells are missing and the number of adult midgut precursor cells are reduced.
Dl9P flies carrying RpS32 in trans have an enhanced Dl wing phenotype and extremely rough eyes. Few flies of this genotype eclose. H2 reduces the central nervous system hypertrophy seen in Dl9P homozygous embryos. Double homozygous Dl9P H2 clones in the eye are viable, and are sometimes indistinguishable from wild-type.