baz << bk1 << l(1)15Fa << B << bk2 << ff
Homozygous embryos have normal gut morphology.
In gynandromorphs, in legs totally composed of cells hemizygous for Df(1)B, tarsal segments 2-5 are fused together into a small bulb-like, non-segmental structure having neither claws nor pulvilli, whereas other leg segments are normal. No central folding occurs in Df(1)B leg discs (in contrast to wild type), although more proximal folds are normally formed. Partial fusion of tarsal segments 2-5 is frequently seen when small Df(1)B clones are induced in the leg. Clones in the leg disc along the periphery of the early ring of B-H1 and B-H2 expression prevent central fold formation in the disc. Clones within tarsal segments 4 and 5 are occasionally associated with campaniform sensilla (normally found only at the dorsodistal tip of tarsal segment 3) and ectopic joint material is seen. In mosaic legs (containing Df(1)B clones) which have normal appearance, all mutant clones are outside tarsal segments 3-5, except for a single case in which a Df(1)B bristle was situated at the proximal tip of tarsal segment 3. No central fold formation is seen in the antennal disc in gynandromorphs in which the antennal disc is hemizygous for Df(1)B. Df(1)B antennae frequently lack the arista and basal cylinder.
Few microchaetae are generated in mutant clones in the prescutum. PS macrochaetae do not develop in mutant clones
Midgut development of mutant embryos is wild type.
Heterozygosity for this deletion has no effect on the mutant ovarian phenotype of ovoD2.
Hemizygous embryos were examined with polarised light microscopy and antibody staining and found to have wild type muscle pattern and contraction.
The deleted region also contains X1 and T1/T2 units not relevant to eye morphogenesis and X2, an uncharacterized unit. Flies deficient for the Bar region have unpatterned, excess cells in the interommatidial space. The secondary effects of this is extensive distortions in rhadomere structure. The absence of Bar may result in aberrant lens formation.
Hemizygotes die at an early larval stage.
Eyes are wild type. Lethal in homozygous and hemizygous condition.