hypomorphic allele - genetic evidence
Insertion of a transposon carrying 7.5kb of en promoter region that drives Ecol\lacZ expression, the insertion point is 14 nucleotides downstream of the most distal initiation start site.
wing vein
Heterozygotes with en1, en6 or Df(2R)en-SFX31 display wing vein abnormalities.
en6
en1