Homozygous cell viable; homozygous clones may have reduced survival in thorax but not in abdomen. Chaetae and trichomes in thorax and abdomen abnormally shaped. Chaetae have rudimentary sockets and shaft is frequently crooked and branched. Trichomes transformed into multiple short outgrowths which appear as swellings on wing cells and as rosettes in abdominal cuticle cells.
Excellent marker for homozygous 3L clones.