Epigenese

Epigenese (gr. epi - på; genos - avkom, dannelse) - Teori som sier at de forskjellige delene av embryo utvikles trinnvis. Første gang foreslått av Aristoteles. Denne teorien var korrekt og i motsetning til teorien om at alle deler av embryo er tilstede fra starten og bare vokser i størrelse (predannelse). Det var en stor diskusjon om disse teoriene 1700-tallet, hvor det ble hevdet at man bl.a. kunne se et lite menneske (homunculus) krøllet sammen i hode av spermiene.

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Publisert 4. feb. 2011 10:17 - Sist endret 4. feb. 2011 10:17
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