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.
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.