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.
didum null homozygotes mutants show substantial larval lethality (adult escapers are rare) and developmental delay.
Embryos derived from females carrying homozygous germ line clones lack pole cells and show defects in abdominal segmentation.