Polytene chromosomes normal.
embryonic abdominal segment 1
embryonic abdominal segment 2
embryonic abdominal segment 3
embryonic mesothoracic segment
embryonic metathoracic segment
Weak allele. Segments T2, T3, A1, A2 and sometimes A3 are deleted.
weak allele segments T2 and 3 and A1 deleted; A2-4 variably deleted.