title: Tale of the orphaned genes.
mesh_terms: D000818:Animals; D005075:Biological Evolution; D004247:DNA / Q000235:genetics*; D005796:Genes; D008040:Genetic Linkage; D006657:Histones / Q000235:genetics; D012617:Sea Urchins / Q000235:genetics
chemical_list: D006657:Histones; D004247:DNA