64C;65A
bk1 << vn << bk2
All limits from polytene analysis (FBrf0089826)
Homozygotes are embryonic lethal. Individuals transheterozygous with a strong EMS vn mutation exhibit small wings. Transheterozygotes with vnL6 are pupal/pharate adult lethal.
All limits from polytene analysis (FBrf0089826)