Homozygotes have a
vg wing phenotype. Postscutellars and halteres are missing.
vg76d1/
vg83b27 transheterozygotes have crumpled and blistered wings, intermediate halteres and wild-type postscutellars.
homozygous wing phenotype like that of vg halteres absent postscutellar bristles absent homozygous viable