412 C. H. DANFORTH 



react differently, a possibility of far-reaching importance is 

 suggested: that, even under normal conditions, the genes 

 which determine the genetic potentialities of a germ cell may 

 have a real survival value for that cell and, moreover, that 

 the prevalence of certain traits appearing in the adult may be 

 in the final analysis largely regulated by the advantage or dis- 

 advantages that the determiners for such traits confer upon 

 the germ cells in which they chance to be lodged. 



LITERATURE CITED 



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of the male rabbit and fowl as indicated by their progeny. Proc. 



Soc. Exp. Biol, and Med., vol. 12, pp. 24-29. 

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cells studied bj^ means of double matings. Science. N. S., vol 39, 



pp. 476-477. 

 Dan'forth, C. H. 1919 The relation of brachydactyly to other characteristics 



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