Imprecise excision of the P{lacW} element deleting 1.0kb of the Pen transcription unit.
female sterile
male semi-sterile
Fs(2)KetRE34, PenD3 has female sterile phenotype
Fs(2)KetRE34 PenD3 double heterozygotes deposit as many eggs as wild type, they look normal but embryogenesis never commences.