. . "Cannot be used when orthologous patterning gene are organizing obviously non-homologous structures in different organisms due for example to pleiotropic functions of these genes." . . "generative homology" . . . "Homocracy that involves recognizably corresponding characters that occurs in two or more taxa, or as a repeated unit within an individual." . . "syngenous to" . . "in syngeny relationship with" . .