Imprecise excision of the progenitor insertion, resulting in a deletion of 857bp which extends from the original insertion site into the Git open reading frame, deleting sequences encoding the N-terminal 109 amino acid residues.
Gitex21C mutant adults exhibit severely reduced brain size as compared to controls, and a subset exhibit defects in mushroom body structure, with terminated alpha or beta lobes, or divided alpha lobes.
100% of homozygous escapers have defective wing morphology; the wings are crumpled, uneven and sometimes curled upwards or not fully spread. Gitex21C/Gitex51C adults also have a defective wing phenotype.
Homozygous escapers produce fewer fertilised eggs than normal.
Embryos lacking both maternal and zygotic Git[+] function show guidance defects in the VO5 and VO6 muscles, which are characterised by bypass and mistargeting of the mutant muscles towards the ventral midline; VO5 and VO6 muscles from opposite sides of late stage mutant embryos inappropriately attach at the ventral midline or fuse together at their meeting point, instead of terminating at a distance from the midline as occurs in wild-type embryos. 60% of VO5/VO6 muscles are affected to various degrees. The VA3 muscle occasionally shows mistargeting towards the ventral midline. There is a low level of increase in the number of lateral transverse (18% of hemisegments and VA3 (7.5%) muscles in these embryos, and in addition, there are low frequencies of muscle shape or attachment defects in the VO1 and LO1 muscles.
Embryos lacking zygotic Git[+] function show a moderate increase in muscle numbers compared to controls for LT (7.5%) and VA3 (3.7%) muscles and they also show defects in VA3 shape and targeting.
Gitex21C, ft8 has visible | somatic clone phenotype
Gitex21C is an enhancer of interommatidial cell | increased number | somatic clone phenotype of hpoMGH1
Gitex21C is a non-enhancer of interommatidial cell | increased number | somatic clone phenotype of hpo5.1
Gitex21C, ft8 has ptilinum | somatic clone phenotype
Gitex21C, Pak20 has presumptive embryonic/larval muscle system phenotype
Gitex21C mutants carrying ft8 clones generated using the eyFLP system show substantial overgrowth of the head, particularly in the ptilinum.
The increase in the number of interommatidial cells which is seen in homozygous hpoMGH1 clones generated using the eyFLP system is enhanced if the clones are also homozygous for Gitex21C.
The increase in the number of interommatidial cells which is seen in homozygous hpo5.1 clones generated using the eyFLP system is not further enhanced if the clones are also homozygous for Gitex21C.
Gitex21C is partially rescued by GitUAS.EGFP/Scer\GAL4how-24B