Homozygotes have a vg wing phenotype. Postscutellars and halteres are missing. vg78a2/vg83b27 transheterozygotes have the same phenotype as vg83b27 homozygotes.
homozygous wing phenotype like that of vg halteres absent postscutellar bristles absent homozygous viable female-fertile?
Induced in a middle stage spermatid.
"irradiation" was stated as tentative. "spontaneous" was stated as tentative.