visible | homeotic (with Df(3R)Abd-BS10)
abdominal tergite 5 & trichome (with Df(3R)Abd-BS10)
Almost all homozygous Abd-BFab8-305-Fab7 mutants (in a Abd-B05649 background) are wild type in appearance and are fertile. In rare cases flies patches of cells in A7 take on an A6 or A8 identity.
Abd-BFab8-305-Fab7, Abd-B05649/Df(3R)R59 mutants display two distinct phenotypes; in some flies the A7 segments take on features characteristic of the A6 segment (a wider sternite with bristles oriented towards the lateral side) and in others they take on features normally seen in A8 (absence of trichomes). The phenotype appears identical regardless of the orientation of the insertion.
Heterozygous adult males show a normal segmentation pattern in the abdomen. Abd-B05649/Df(3R)Abd-BS10 males show abdominal transformations; the A7 tergite is fully developed in these animals, indicating a transformation towards an A5/A6 identity. In addition, the A5 tergite is partially transformed towards A4, as indicated by a partial loss of pigment in anterior regions and by the trichome pattern.
Anal plate twisted in both males and females.
A. Spradling.