Nucleotide substitution: G1682A.
Amino acid replacement: W561term.
Adults carrying fz6E3.Act5C in a fz21 background have an average of 2.4 +/- 0.5 extra tarsal joints in the leg compared to wild type.
fz6E3.Act5C rescues the wing margin phenotype of fz21 fz2C1 double homozygous clones.