Imprecise excision of the progenitor insertion has resulted in a deletion that removes a portion of the mfrn gene.
Df(3R)ED6277/mfrnDf13 is rescued by mfrnVenus
mfrnT:Avic\GFP-YFP.Venus rescues the male sterility of mfrnSH115/mfrnDf13 and mfrnDf13/Df(3R)ED6277 flies.