1.6kb DNA insertion and an approximately 100bp duplication near the 5' end of the upd1 gene.
upd1sisC-1 has no mutant phenotype by itself, even when hemizygous over a deficiency for upd1.
Bap601, sisA[+]/sisA1, upd1sisC-1/os[+] has partially lethal - majority die | dominant | maternal effect | female limited phenotype
sisA1, upd1sisC-5/upd1sisC-1 has lethal | dominant phenotype
sisA1, upd1sisC-5/upd1sisC-1, upd1t4.8 has lethal phenotype
sisA1, upd1sisC-5/upd1sisC-1 has lethal phenotype
sisA[+]/sisA1, upd1sisC-5/upd1sisC-1, upd1t4.8 has lethal phenotype
sisA[+]/sisA1, upd1sisC-5/upd1sisC-1, upd1t10 has partially lethal phenotype
sisA[+]/sisA1, upd1sisC-5/upd1sisC-1, upd1t5.8 has partially lethal phenotype
Maternal heterozygosity for Bap601 reduces the viability of female offspring which are doubly heterozygous for sisA1 upd1sisC-1.