89E2-89E3;90C-90D
89E;90C-90D
Ubx << bk1 << Abd-B << bk2
Heterozygotes with Df(3R)Ubx-RS4-8 or Df(3R)Abd-BS10 have seven fully developed abdominal segments rather than the normal six, with no A7 development, due to anterior transformation of A7, but incomplete pigmentation in A6 and A7, indicating absence of A5 and A6 identities.
Reverts the Abd-BMc microcephalus phenotype.
Break in BX-C maps to +108-112.5
Left limit of break 1 from non-inclusion of Ubx (FBrf0080101) Right limit of break 1 from inclusion of Abd-B (FBrf0080101) Limits of break 2 from polytene analysis (FBrf0080101)