Imprecise excision of the progenitor insertion, resulting in an internal deletion of the insertion sequences.
female fertile
wisp89/wisp[+] is an enhancer of lethal | embryonic stage | maternal effect phenotype of orbmel
The percentage of maternal effect embryonic lethality seen in embryos derived from orbmel homozygous females is increased by heterozygosity for wisp89. The percentage of ventralised embryos is not increased by heterozygosity for one copy of wisp89.