wild-type allele
A 0.43kb LTR of the progenitor roo insertion remains, 674bp downstream of male specific exon 3; 249bp upstream of exon 4. The roo LTR is transcribed in the opposite direction to Sxl.
Deletion of approximately 8kb of the roo element present in SxlM1, leaving the terminal repeats in place.
deletion
viable
viable | male
return of wild-type function by partial deletion of SxlM1 insert