Imprecise excision of the progenitor insertion, resulting in a approximately 5.4kb of the original insertion remaining with no alteration in the Bin1 open reading frame.
visible (with Df(3R)sbd45)
67% of Bin118/Df(3R)sbd45 males show transformation of A6 to A5, as judged by the presence of at least one bristle on the sixth sternite.