Mutant embryos have no major defects in the central nervous system; the longitudinal connectives and commissural axon bundles are comparable to those in wild-type embryos.
RhoGEF64Cunspecified is an enhancer of abnormal neuroanatomy phenotype of fraunspecified
RhoGEF64Cunspecified is an enhancer of presumptive embryonic/larval central nervous system phenotype of fraunspecified
Gef64Cunspecified enhances the axon guidance defects seen in fraunspecified embryos; there is a substantial reduction in commissure thickness and a greater number of segments where commissures fail to form.