Homozygotes have a vgnw wing phenotype. Postscutellars and halteres are missing. vg79h7/vg83b27 transheterozygotes have the same phenotype as vg83b27 homozygotes.
homozygous wing phenotype like that of vgnw halteres absent postscutellar bristles absent homozygous viable female-fertile?
Induced in an early stage spermatid.