40kb of regulatory DNA, downstream from the transcription unit, are removed from the bi gene.
Deletion of sequences proximal to +30kb.
increased size | adult stage (with biomb-282)
visible | adult stage (with biomb-282)
Hemizygous males show fusion of veins at the base of the wing and a small amount of notching at the wing tip.
Disruption of visual input can unmask CaMKII-dependent memory formation. Locomotor activity shows no defects in white or dim red light.
Reduction in fibre number in the anterior optic tracts.
Normal external morphology but with discrete defects in optic lobes and behaviour. Reduction in wing size and increase in tergite pigmentation.
Flies have an increased reflectance on the wing surface, indicative of the lac phenotype. The lac phenotype is caused by position effect or second site mutation rather than directly at the breakpoint.
ERG defect, slow return of the potential to base light at light off.
The optomotor yaw response is reduced to 12% of the wild-type response. The lobula plate is reduced in thickness. The giant VS- and HS-cells are present but are reduced in size. The distribution of metabolic activity (measured by 3H-deoxyglucose autoradiography) in the optic lobes does not differ substantially from wild-type.
Mushroom bodies have normal size and shape. Normal olfactory learning. Structural defects are restricted to visual system.
Defects in the lobula plate giant neurones of the visual system.
Adults impaired in optomotor turning responses in tests involving tethered or freely moving flies (FBrf0032046; FBrf0038345; FBrf0048204; FBrf0050160). The mutant is also aberrant in orientation to vertical stripe (FBrf0032046). More detailed examination of 'yaw torque' optomotor responses show that mutant is restricted in responses to stimulation of 'frontal visual field', with mutant behavior summarized as retaining 'object responses' but missing 'large field responses' (FBrf0044893). The mutant is relatively normal in 'lift/thrust' response to vertical pattern movement and in regard to landing response elicited by front-to-back horizontal motion. Slow phototaxis, using Y-tube, was markedly subnormal (FBrf0050160). Mutants show anomalous avoidance reaction, i.e., 'antifixation' to objects in Y-maze test (FBrf0063339); courting males exhibit diminished tracking responses of and turning responses to moving females (FBrf0034187; FBrf0037487). Visual stimulus-induced metabolic activity in the optic lobes
biomb-1 has visible | recessive phenotype, enhanceable by p38bDN.UAS/Scer\GAL469B
biomb-1 has visible | recessive phenotype, enhanceable by p38ba.UAS/Scer\GAL469B
biomb-1, pucE69 has increased cell death phenotype, suppressible by fu1
biomb-1, pucE69 has increased cell death phenotype
biomb-1 has wing vein phenotype, enhanceable by p38ba.UAS/Scer\GAL469B
biomb-1 has wing phenotype, enhanceable by p38bDN.UAS/Scer\GAL469B
biomb-1 has wing vein phenotype, enhanceable by p38bDN.UAS/Scer\GAL469B
biomb-1 has wing phenotype, enhanceable by p38ba.UAS/Scer\GAL469B
biomb-1/biomb-1 is an enhancer of wing vein L5 phenotype of ab1
biomb-1/bi[+] is an enhancer of wing vein L5 phenotype of ab1
ab1, biomb-1 has wing vein L5 phenotype
ab1, biomb-1 has posterior crossvein phenotype
ab1, biomb-1/bi[+] has wing vein L5 phenotype
ab1/ab[+], biomb-1 has wing vein L5 phenotype
The wing notching phenotype of biomb-1/Y flies is significantly enhanced by a single copy of pucE69 or hepCA, and in the case of hepCA a wide region of the wing blade is lost, leaving only the base of the wing. The appearance of this apoptotic cluster in the primordial wing tip of late third larval instar biomb-1/Y wing discs is more apparent if the larvae are also heterozygous for wgl-16.
Flies will avoid the visual object within the Y-maze.