Polytene chromosomes normal.
Insertion of 8kb of unknown DNA within the 5' flanking sequences.
Exon insertion at position +2.
8kb insertion into an exon.
8kb insertion.
insertion (8 kb) at + 3kb; '+' values to right (distal); 0 coordinate assigned to insert position of vg21; Williams, Atkin and Bell (1990).
Sensitive to aminopterin.
Heterozygotes with vg83b27 have a less extreme reduction of wings and haltere structures.
Lasko.
Secondary recessive lethal on the chromosome.