A5-A8 are transformed to A4, females lack genitalia, and there is a weak haploinsufficient transformation of A5-A8. Parasegments 10-13 are transformed to parasegment 9 in embryos.
Transformation of A7 towards A5 or A6, lack posterior spiracles and have no ninth ventral setal band.
Fails to complement iab-5 and iab-6 alleles.
Weak allele.