A whole-genome duplication event in the teleost lineage allowed for the neofunctionalization of the voltage-gated sodium channel gene Scn4aa which produces electric discharges. Early research pointed to convergence between lineages, but more recent genomic research is more nuanced.
A whole-genome duplication event in the teleost lineage led to the neofunctionalization of the voltage-gated sodium channel gene Scn4aa, which generates electric discharges. Early research suggested a convergence between lineages, but more recent genomic studies are more nuanced.