He reevaluates August Weismann's model of the cell compartmentalization of somatic and germline cell lineages (see Weismann barrier), and argues that the vision of the individual taken by the modern synthesis is insufficient to explain the early evolution of development or ontogeny.
The Weismann barrier is the principle, proposed by August Weismann, that hereditary information moves only from genes to body cells, and never in reverse.
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A controversial theory of Edward J. Steele's suggests that endogenous retroviruses carry new versions of V genes from soma cells in the immune system to the germ line cells.
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