spn-F^unspecified oocyte nuclei often exhibit fragmented DNA that can be thread-like in appearance.

spn-F^unspecified mutants exhibit considerably shorter and thicker bristles compared to wild-type. In addition to aberrant length and width, the morphology of the bristles is altered; they do no have finely tapered ends, and, in some extreme cases, the direction of bristle growth at some points along the bristle shaft is altered.

In stage 9 spn-F^unspecified mutant oocytes exhibit an abnormal accumulation of tubulin and microtubules around the oocyte nuclear membrane. The oocyte nucleus does, however, move normally to the dorsoanterior corner in the mutant egg chambers. In 60% of spn-F^unspecified mutant egg chambers, small irregularly shaped actin aggregates and actin clump are found along the anterior ring below the actin-rich cortical layer.