Winging It

摘要

Genes that explain phenotypic variation between species have only been identified within a handful of model organisms, which limits the scope and understanding of the genetics of phenotypic diver sification. On investigating the phenotypic diversity in wing size among wasps of the genus Nasonia, Loehlin and Werren (p. 943) have identified the genetic basis of a morphological difference between two closely related species and showed how changes in regulatory elements have evolved to change expres sion of a single gene, unpaired-like (upd-like), a functionally conserved signaling gene.