Oxford Journals
Field of reference: Biology
Description: The appearance of a particular organ is the product of the genotype and the epigenotype, reacting with the external environment’.
"Historically, the term ‘epigenetics’ is attributed to Conrad Waddington (1905–75) who in the late 1930s remarked ‘It is, surely, obvious that the fertilized egg contains constituents which have definite properties which allow only a certain limited number of reactions to occur; in so far as this is true, one may say that development proceeds on a basis of the “preformed” qualities of the fertilized egg. But equally it is clear that the interaction of these constituents gives rise to new types of tissue and organ which were not present originally, and in so far development must be considered as “epigenetic” ’ [1]. He further remarked that ‘One might say that the set of organizers and organizing relations to which a certain piece of tissue will be subject during development make up its “epigenetic constitution” or “epigenotype”; then the appearance of a particular organ is the product of the genotype and the epigenotype, reacting with the external environment’."
| שייך לנושאים: 1-13 - חינוך אינטגרלי, -מקורות מדעיים, השפעת הסביבה, 3. השפעת הסביבה = חוק |
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