P-element insertion.
The number of sperm stored in the spermathecae of GldP4l/Gld3689 females is significantly reduced if they are crossed to a previously mated GldP4l/Gld3689 male, compared to wild-type females crossed to a previously mated GldP4l/Gld3689 male, although the number of sperm stored in the seminal receptacle is not significantly different between the two types of females. The sperm distribution in the two capsules of the spermathecae is highly asymmetrical in GldP4l/Gld3689 females crossed to either a virgin GldP4l/Gld3689 male or a previously mated GldP4l/Gld3689 male.