Table 2. An overabundance of Grs expressed in female legs are the result of Heliconius-specific duplication.

Gene Family	Gene duplication	Gene Expression
		Female-specific	Both sexes	P value†
Gr ‡	Heliconius-specific	15	20	0.019
	Conserved*	1	13
Or §	Heliconius-specific	6	12	0.483
	Conserved*	5	19

^*Consists of single-copy genes in H. melpomene; in the monarch or Bombyx genomes, homologues are either single-copy or duplicate genes with bootstrap support ≥80%.

^†Fisher's exact test, two-tailed, d.f. = 1.

^‡Excludes Gr39 because of poor coverage in the reference genome read-mapping.

^§Excludes Or20 and Or24 because of coverage in the reference genome.