Imprecise excision of the progenitor insertion, resulting in a deletion of part of the Pof gene.
viable
No PofD31A/PofD114 haplo-4th chromosome individuals survive in the progeny of a cross of PofD31A heterozygous females to PofD114 heterozygous males carrying a compound 4th chromosome.
PofD114/PofD119 and PofD2/PofD119 individuals show haplo-4th chromosome specific lethality.
PofD31A/PofD114 is rescued by Pof+tLa