Early E(z)66 embryos from heterozygous mothers exhibit significantly under-condensed chromatin at metaphase, causing the metaphase plate to increase from the wild-type width of ~2μm to ~5μm. These embryos exhibit chromatid arms that do not properly align at the metaphase plate, but instead project outwards. These embryos show a higher level of "nuclear fallout", a process that removes nuclei with abnormal mitoses, than wild-type embryos. This nuclear fallout is not severe and is often observed at the metaphase stage.
Weak antimorphic suppressor of z1 wis eye colour.
Dominant suppressor of z mutants.