50% of nesd^EY08338 mutant males are sterile. Males exhibit multinucleate spermatids in 21% of cells. These spermatids display a failure of cytokinesis during one or both meiotic divisions. Onion stage spermatids contain two or four haploid nuclei accompanied by an enlarged Nebenkern.

The contractile ring constricts asymmetrically in 46% of nesd^EY08338 mutant spermatocytes. Subsequently, the cleavage furrow collapses and the contractile ring fails to form a robust circular structure. Membrane invagination collapses and isolated contractile ring remnants are observed in the cytoplasm. Cytokinesis fails in 49% of spermatocytes, and plasma membrane invagination is asymmetric and incomplete in 27% of mutant cells. Ring canals fail to assemble during late cytokinesis.

80% of nesd^EY08338/Df(2L)ED1305 mutant males are sterile. Males exhibit multinucleate spermatids in 32% of cells. These spermatids display a failure of cytokinesis during one or both meiotic divisions. Onion stage spermatids contain two or four haploid nuclei accompanied by an enlarged Nebenkern.

38% of nesd^EY08338 mutant egg chambers at stage 9 and 10 contain remnants of ring canals associated with binucleate nurse cells, which is never observed in control animals or nesd^EY08338 egg chambers from an earlier developmental stage.

Df(2L)ED1305/nesd^EY08338 has abnormal meiotic cell cycle phenotype, enhanceable by pav[+]/pav^B200

Df(2L)ED1305/nesd^EY08338 has partially lethal - majority die phenotype, non-suppressible by pav^{Ubi-p63E.mGFP6}