Insertion of P{SUPor-P} into first intron of jumu approximately 6kb 3' to the start of transcription, in reverse orientation.
mitosis & nuclear chromosome
Dominantly decreases transmission of Dp(1;f)J21A to offspring to 45%. Lethality acts in the third larval instar. Larval neuroblast squashes reveal a normal mitotic index, though many mitotic figures appear polyploid.