Ontogeny (also ontogenesis or morphogenesis) describes the origin and the development of an organism from the fertilizedegg to its mature form. Ontogeny is studied in developmental biology. Morphogenesis (from the Greek morphÃª shape and genesis creation) is one of three fundamental aspects of developmental biology along with the control of cell growth and cellular differentiation. ... In biology and ecology, an organism (in Greek organon = instrument) is a complex adaptive system of organs that influence each other in such a way that they function as a more or less stable whole and have properties of life. ... Categories: Biology stubs ... A human ovum An ovum (from Latin, loosely, egg or egg cell) is a female sex cell or gamete. ... Sexual maturity is the stage at which an organism can reproduce. ... Developmental biology is the study of the process by which organisms grow and develop. ...
The idea that ontogeny recapitulates phylogeny, that is, that the development of an organism exactly mirrors the evolutionary development of the species, is discredited today. However the phenomena of recapitulation, in which a developing organism will for a time show a similar trait or attribute to that of an ancestral species, only to have it disappear at a later stage is well documented. For example, embryos of the baleen whale still develop teeth at certain embryonic stages, only to later disappear. A more general example is the emergence of pharyngeal gill pouches of lower vertebrates in almost all mammalian embryos at early stages of development. (Mayr, 2001) The theory of recapitulation, also called the biogenetic law or ontogeny recapitulates phylogeny, is a hypothesis in biology which attempts to explain apparent similarities between humans and other animals. ...
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Categories: Biology stubs | Developmental biology Morphogenesis (from the Greek morphÃª shape and genesis creation) is one of three fundamental aspects of developmental biology along with the control of cell growth and cellular differentiation. ... The phenotype of an individual organism is either its total physical appearance and constitution or a specific manifestation of a trait, such as size, eye color, or behavior that varies between individuals. ... The genotype-phenotype distinction refers to the fact that while genotype and phenotype of an organism are related, they do not necessarily coincide. ... In ecology and biology, a norm of reaction describes the pattern of phenotypic expression of a single genotype across a range of environments. ... In biology and psychology Gene-environment interaction is a term used to describe any phenotypic effects that are due to interactions between the environment and genes. ... Heritability, as used professionally in genetics, has a very precise definition. ... Quantitative genetics is the study of continuous traits (such as height or weight) and its underlying mechanisms. ... Genetic architecture refers to the underlying genetic basis of a phenotypic trait. ... It has been suggested that dominant gene be merged into this article or section. ... Epistasis takes place when the action of one gene is modified by one or more others that assort somewhat independently. ... Polygenic inheritance is the inheritance pattern of a trait controlled by two or more genes. ... Pleiotropy is the multiple effects of a single gene. ... We dont have an article called Phenotypic plasticity Start this article Search for Phenotypic plasticity in. ... Norms of reaction for two genotypes. ... In evolutionary biology, fitness landscapes or adaptive landscapes are used to visualize the relationship between genotypes (or phenotypes) and replicatory success. ... It has been suggested that this article or section be merged with Epigenetics. ... Epigenetics is the study of reversible heritable changes in gene function that occur without a change in the sequence of nuclear DNA. It is also the study of the processes involved in the unfolding development of an organism. ... A maternal effect, in genetics, is the phenomena where the genotype of a mother is expressed in the phenotype of its offspring. ... Segmentation in biology refers to the division of some metazoan bodies and plant body plans into a series of semi-repetitive segments, and the question of the benefits and costs of doing so. ... Modularity is a concept that has applications in the contexts of computer science, particularly programming, as well as cognitive science in investigating the structure of mind. ... Evolvability is a concept in that relates ability of a particular phenotype to be robust to mutations. ... Mutational robustness describes the extent to which an organisms phenotype remains constant in spite of mutation. ... The evolution of sex is a major puzzle in modern evolutionary biology. ... Conrad Hal Waddington (1905 â 1975), known to his friends as Wad, was a developmental biologist, paleontologist, geneticist, embryologist and philosopher. ... Richard Lewontin Richard Charles Dick Lewontin (born March 29, 1929) is an American evolutionary biologist, geneticist and social commentator. ... Nature versus nurture is a shorthand expression for debates about the relative importance of an individuals innate qualities (nature) versus personal experiences (nurture) in determining or causing individual differences in physical and behavioral traits. ... This is a list of topics in evolutionary biology and evolution. ...
Ontogeny is the history of the individual organism, phylogeny the history of the race or lineage (the linnean taxa or cladistic tree).
Ontogeny can be the history of the universe, or the development of the psyche, or even, as indicate by the above Theosophical diagram, the evolution of the soul, spanning many lifetimes.
On a somewhat smaller scale, the ontogeny of the universe is the totality of the phylogenies of the each and all of the parts of the universe - atoms, molecules, stars and planets, rocks and bacteria and plants and animals and genes and memes and all the rest.
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