FlyBase curator comment: this entry is used to capture phenotypic information when the particular allele (or allele combination) used by the author could not be determined but the context of the experiment suggests that the phenotype being described is some kind of loss of function.
Nurse cell-oocyte fusions are seen in the egg chambers of females containing homozygous germline clones. Transheterozygotes are female sterile, producing unfertilised eggs. Escapers often show embryonic head defects.