epigenesis


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Related to epigenesis: Epigenetics

epigenesis

 [ep″ĭ-jen´ĕ-sis]
the development of an organism from an undifferentiated cell, consisting in the successive formation and development of organs and parts that do not preexist in the zygote. adj., adj epigenet´ic.

ep·i·gen·e·sis

(ep'i-jen'ĕ-sis),
1. Development of offspring from a zygote. Compare: preformation theory.
2. Regulation of the expression of gene activity without alteration of genetic structure.
[epi- + G. genesis, creation]

epigenesis

(ĕp′ə-jĕn′ĭ-sĭs)
n.
1. Biology The theory that an individual is developed by successive differentiation of an unstructured egg rather than by a simple enlarging of a preformed entity.
2. Geology Change in the mineral content of a rock because of outside influences.

ep·i·gen·e·sis

(ep'i-jen'ĕ-sis)
1. Development of offspring from a zygote.
2. Regulation of the expression of gene activity without alteration of genetic structure.
[epi- + G. genesis, creation]

epigenesis

the formation of entirely new structures during the development of the EMBRYO.
References in periodicals archive ?
Mientras que la Epigenesis creia que el individuo partia de una materia indiferenciada e iba generando nuevas estructuras, o sustituyendo unas por otras, a lo largo de las diferentes fases de su desarrollo embrionario.
Incorporar la nocion de epigenesis en la comprension del desarrollo implica tambien tender puentes de discusion entre las actuales nociones epigeneticas en biologia evolutiva (o teorias evodevo, e.
Siguiendo esta misma idea de la interaccion, cuando habla de epigenesis neuronal y evolucion cultural (capitulo VI), defiende que "la formacion de los billones de sinapsis que conforman el cerebro adulto escapa, hasta cierto punto, al control absoluto de los genes" (p.
Epigenesis of an epigeneticist: the development of some alternative concepts on the early ontogeny and evolution of fishes.
On the other hand, the epigenesis of the self results in a "multitude of selves," in a "peeling" of the father--the father who is a powerless sign, paralyzed, with a thin tube inserted into his penis (see Tsing, 19).
As the development of a disease or disorder can be viewed as resulting from the interplay of genetic and environmental factors over the life span of the individual, potent environmental influences may manifest at many stages of life: as a gamete, as an embryo, during epigenesis, in utero, during childhood, during adulthood, or with aging.
Moss frames his remarkably dense 200-page essay in terms of two general concepts of genetics: preformationism, which in the extreme is embodied by genetic determinism, and epigenesis, which gives considerable leeway to the messages transcribed from genes to modulate the phenotype.
Epigenesis, and Evolution: Taking Development Seriously (Cambridge: Cambridge University Press, forthcoming).
Spelke, "Physical Knowledge in Infancy: Reflections on Piaget's Theory," in The Epigenesis of Mind: Essays on Biology and Cognition, Susan Carey and Rochel Gelman, eds (Hillsdale, NJ: Erlbaum, 1991).
The patent is licensed to EpiGenesis Pharmaceuticals for limited applications.
EpiGenesis is working on a nucleic acid to be absorbed by lung cells.
This "epigenesis" of reason and our fundamental capacity to judge that drives it is the topic of Longuenesse's fascinating book, and the source of her title.