Homozygotes have a vg wing phenotype. Postscutellars and halteres are missing. vg83c45/vg83b27 transheterozygotes have vg wings, missing halteres and wild-type postscutellars.
homozygous wing phenotype like that of vg halteres absent postscutellar bristles absent homozygous viable female-fertile?
male.
"irradiation" was stated as tentative. "spontaneous" was stated as tentative.