 Jablonka and Lamb’s classification of inheritance systems on the basis of their mechanismic differences is not the only classification approach which focuses on hereditary variations. Recently, Helanterä &amp; Uller (2010) analyzed the inheritance systems Jablonka and Lamb identified based on their evolutionary consequences. They claim that Jablonka and Lamb’s mechanismic classification does not match a classification of means of inheritance according to their evolutionary properties, and suggested classifying them into three categories: vertical transmission which covers cases in which traits are transmitted from parent to offspring such as genetic inheritance and some epigenetic phenomena; induction which covers cases in which the environment determines change between parent and offspring such as induced genetic mutations and maternal effects; and acquisition which covers cases in which traits originate from non-parental individuals or other sources, for example horizontal gene transfer and various forms of learning. Similarly, Day and Bonduriansky (2011), using a unified framework based on the Price Equation, have argued that while the diversity of inheritance mechanisms is very large they give rise to a much more limited set of inheritance patterns, characterized as unique combinations of reproductive transmission rules.