Following upregulation of W expression at stage 9, cells in the presumptive head and thorax regions of bcdunspecified embryos undergo cell death between stages 10 and 14. This is followed by decellularization and tissue clearance of these regions at stages 14-17. bcdunspecified larvae are missing the head and thorax and show transformation of the anterior acron into a telson.
Gnathal and thoracic structures are deleted in embryos derived from homozygous females, and the telson is duplicated anteriorly. Anterior abdominal segments are often fused. The cephalic fold is shifted anteriorly in embryos derived from heterozygous females.
bcdunspecified has increased cell death | embryonic stage phenotype, enhanceable by torunspecified
bcdunspecified has increased cell death | embryonic stage phenotype, suppressible by hidrvX1/Df(3L)H99
bcdunspecified has increased cell death | embryonic stage phenotype, suppressible by BacA\p35UASp.cWa/Scer\GAL4Tub.PU
bcdunspecified has phenotype, enhanceable by hbbcd.3UTR
bcdunspecified has phenotype, suppressible by tslunspecified/hbbcd.3UTR
bcdunspecified has larval head phenotype, non-suppressible by hidrvX1/Df(3L)H99
bcdunspecified has larval thorax phenotype, non-suppressible by hidrvX1/Df(3L)H99
bcdunspecified is an enhancer of embryo | anterior phenotype of exuunspecified
hbbcd.3UTR/bcdunspecified is a suppressor of phenotype of tslunspecified
hidrvX1/Df(3L)H99, bcdunspecified has larval abdominal segment phenotype
The increased cell death that occurs in the presumptive head and thorax regions of bcdunspecified embryos can be suppressed by expression of BacA\p35Scer\UAS.P\T.cWa under the control of Scer\GAL4tub, or by mutation of W, as observed in bcdunspecified, Df(3L)H99/WrvX1 double mutants. bcdunspecified, Df(3L)H99/WrvX1 double mutant larvae have an expanded first abdominal segment that is transformed into a posterior A8 identity, but still lack the head and thorax. Therefore, the transformed abdominal segment must usually undergo cell death in bcdunspecified single mutants, due to the mis-specificity of the cells within it. In torunspecified; bcdunspecified double mutant embryos, the mis-specified tissue which becomes the transformed telson in bcdunspecified single mutants undergoes decellularization and tissue clearance.
Enhances the exuunspecified embryonic phenotype.
bcdunspecified is rescued by bcdDronpa
bcdunspecified is rescued by bcdEGFP
bcdunspecified is rescued by bcdΔ
bcdunspecified is not rescued by bcdΔK50-57.Venus
bcdT:Zzzz\Dronpa rescues the sterility of females homozygous for bcdunspecified.
ems expression in embryos with different numbers of functional bcd genes has been studied.