(1) Sacks suggests that the way to learn a subject is to go through it historically for oneself - a mental version of ontogeny recapitulating phylogeny - and the account of him doing so is as lovely as it is riveting.(2) Heterometry should be applicable only to morphological features that are considered fixed in number through ontogeny .(3) There is however one problem, namely that much of the ontogeny and behavior of biological organisms is not intentional.(4) Heterochronic evolution has been defined as a morphological change inscribed within an ontogenetic trajectory that produces parallelism between ontogeny and phylogeny.(5) There shall always be exceptions, but the rule is that heredity to a large extent determines the environment in which we are going to live - or ontogeny determines phylogeny.(6) If ontogeny really did recapitulate phylogeny, then phylogenetic relationships might be determined directly by reference to ontogenetic sequences.(7) Measurement of the distinguishing characteristics of the skeleton - the skull and pelvis - led some anatomists to conclude that white women ranked below European men in the scales of both ontogeny and phylogeny.(8) In summary, the available evidence from both ontogeny and adult morphology suggests that the first ambulacral is at least involved in the construction of the MAO.(9) Hmm… Since ontogeny recapitulates phylogeny I don't think there actually is a completion of the quest.(10) So these small horns may be more relevant to the study of dinosaur ontogeny than phylogeny (evolution).(11) These models stress the dynamics during ontogeny of the cellular components of growth and morphogenesis.(12) Can anyone get more obscure than biologists and paleontologists, who reflect for thirteen syllables on whether or not ontogeny recapitulates phylogeny?(13) Selection may act to modify ontogeny and ultimately determine morphology and function.(14) Progress in our understanding of the relationships between ontogeny and phylogeny forever seems to be bogged in nomenclatural disputes.(15) Given the interest in comparative approaches in biology, new examples of embryonic ontogeny of osmoregulation should be investigated in species with internal or external development.(16) Although a strong form of recapitulation is not correct, phylogeny and ontogeny are intertwined, and many biologists are beginning to both explore and understand the basis for this connection.
