Gradients that organize embryo development.

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  • Author(s): Nusslein-Volhard, Christiane
  • Source:
    Scientific American. Aug96, Vol. 275 Issue 2, p54. 6p. 2 Color Photographs, 4 Black and White Photographs, 5 Diagrams.
  • Additional Information
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    • Abstract:
      Discusses the gradient hypothesis concerning the development of uniform egg cell into an animal with dozens of types of cells. Response of cells in a developing field to a special substance, morphogen, forming a gradient; Difficulties in explaining how a morphogenetic gradient could be established and remain stable for a period of time; Discovery of gradient process in the early embryo of the fruit fly `Drosophila.'