Imprecise excision of the P{bluetail} element, deleting sequences proximal to the site of the P{bluetail} insertion.
Flies show a dominant Fab-7 gain of function phenotype similar to the Abd-BFab7-2 phenotype. Homozygotes show incomplete transformation of abdominal segment A6 to A7.
Abd-BFab7-28 has phenotype, enhanceable by Pc3
Abd-BFab7-28 has phenotype, enhanceable by ScmD1
Abd-BFab7-28 has phenotype, enhanceable by Df(2R)trix
Abd-BFab7-28 has phenotype, enhanceable by Pcl10
The heterozygous gain of function phenotype is enhanced by Polycomb group mutations such as Pc3, Pcl10, ScmD1 and Df(2R)trix.