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Lyon's hypothesis


Also known as:
Lyon’s phenomenon

Associated persons:
Mary Frances Lyon

Description:
Hypothesis stating that only one of the two X-chromosomes is genetically active in female cells. X inactivation occurs around the 16th day of embryonic development.

Bibliography:
  • M. F. Lyon:
    Gene action in the X-chromosome of the mouse (Mus musculus).
    Nature, London, 1961, 190: 372-373.
    Theory of differential inactivation of the X-chromosome.



 
 

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