Inversion breakpoint is between map positions 201 and 205.
cuticle & procephalic segment
All heterozygous females are dead. Embryos have a thin layer of cuticle in the cephalic region.
Abnormal embryonic development: thin layer of cuticle but no hypoderm or muscles are found at the postgnathal-thoracic region. Gross distortion of the anterior half of the embryo, abnormal structure of the nervous system.
Flies manifest chronic vibration of their appendages as well as abnormal action potentials.
Mutation in the haplo-lethal (HL) region of the Sh complex.
Mutation within the haplo-lethal (HL) region of the Sh complex.