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.
fz3unspecified is an enhancer of wing phenotype of Ser1
Addition of fz3unspecified to SerD flies enhances the wing notching phenotype seen in these flies. A second copy of fz3unspecified enhances this phenotype further and results in additional posterior margin notching.