Nucleotide substitution: G1683A.
Amino acid replacement: W561term.
Adults carrying fz47B3.Act5C in a fz21 background have an average of 2.9 +/- 0.4 extra tarsal joints in the leg compared to wild type.
fz47B3.Act5C partially rescues the wing margin phenotype of fz21 fz2C1 double homozygous clones.