Homozygotes lack wings. The phenotype shows some variation and overlapping with wild type. Heterozygotes have a terminal notch between wing veins L2 and L3.
homozygote shows vestiges of wings; postscutellars erect; viability 50%; female sterile; terminal nicks in vgNo1/+ RK2.
Swigert, March 1931.
H.A. Swigert