 According to the traditional view in evolutionary theory selection operates on individual organisms. This view can incorporate multiple inheritance systems and channels within a single evolutionary process by viewing each inheritance system or channel as providing developmental resources for the construction of individual organisms, leading to a single evolutionary process operating on lineages of organisms (qua interactors). Alternatively, lineages of phenotypic traits that may be affected by more than one inheritance system or channel may be subject to selection. According to this view phenotypic traits are the targets or units of selection (Jablonka 2004).