Orthogenesis, also known as orthogenetic evolution, progressive evolution, evolutionary progress, or progressionism, is an obsolete biological hypothesis that organisms have an innate tendency to evolve in a definite direction towards some goal (teleology) …

直生论（orthogenesis）一种 反对 自然选择学说 的进化理论。 主张生物进化是有方向的，不论环境条件如何，生物总是沿着既定的方向进化；而决定进化方向的动力，完全来自生物体内部的潜在力量，与自然选择无关。 持这种观点的学者又有各不相同的名称。 “直生论”一词由德国动物学家哈克（J.W.Haacke）所创立，后为爱米尔（T.G.H.Eimer）等人所采用，伯格（L.S.Berg）称为“循规发说”（nomogenesis），在奥斯本（H.F.Osborn）称为“芒状发生说”（aristogenesis），德日 …

orthogenesis, theory that successive members of an evolutionary series become increasingly modified in a single undeviating direction. That evolution frequently proceeds in orthogenetic fashion is undeniable, though many striking features developed in an orthogenetic group appear to have little if any adaptive value and may even be markedly ...

Orthogenesis, (from the Greek "ortho," meaning straight, and "genesis," meaning production) is the theory that variations and hence evolutionary change occur along certain definite lines im-

Orthogenesis arose from early twentieth century discoveries about genetic inheritance, especially homeotic mutations, and largely replaced Neo-Lamarckism until orthogenesis itself was replaced by the Modern Synthesis evolutionary theory in which selection and drift act on mutations within a population structure.

2018年10月4日 · Orthogenesis refers to a concept of evolution involving biological processes that establish and spread new variations without requiring differential survival and reproduction. Orthogenesis was originally based on the observation that …

2006年11月1日 · In this paper, we make a brief survey of the history of ideas of directed evolution. We also give a historically founded definition of orthogenesis and describe possible structural levels and...

This book reviews the convoluted history of orthogenesis with an emphasis of non-English sources, untangles relationships between various concepts of directed evolution and argues whether orthogenesis has something to offer modern biology. Darwinism claims that evolution occurs by selection from an extensive random variability.

orthogenesis，英语单词，主要用作名词，作名词时译为“系统发生说；[生物] 直生论；定向进化现象（等于orthoselection）”。

Orthogenesis, orthogenetic evolution, progressive evolution or autogenesis, is the hypothesis that life has an innate tendency to move in a unilinear fashion due to some internal or external "driving force". The hypothesis is based on essentialism, finalism and cosmic teleology and proposes an intrinsic drive which slowly transforms species.