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epigenesis

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epigenesis /epi·gen·e·sis/ (-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 fertilized egg.epigenet´ic
ep·i·gen·e·sis (p-jn-ss)
n.
The theory that an individual is developed by successive differentiation of an unstructured egg rather than by a simple enlarging of a preformed entity.
epi·ge·netic (-j-ntk) adj.
epigenesis
[ep′ijen′əsis]
Etymology: Gk, epi + genein, to produce
(in embryology) a theory of development in which the organism grows from a simple to more complex form through the progressive differentiation of an undifferentiated cellular unit. Compare preformation. epigenesist, n., epigenetic, adj.
epigenesis
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 fertilized egg.


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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.
NIEHS Dual-Degree Predoctoral Fellowships for Training ... by Environmental Health Perspectives
A system such as ISVD can help inquirers convert impersonal facts or data to personal information, and may thereby lead them to comprehension of epigenesis in their individual patterns of career development through analysis, practice, and understanding of decision-making development.
Computer-Based Career Planning Systems: Dreams and Realities by Sampson Jr., James P. / Career Development Quarterly
Before there was embryology, or genetics, or microbiology, there was preformation and epigenesis.
The Ovary of Eve: Egg and Sperm and Preformation by Thomas, Joe A. / The Journal of Sex Research
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