346 



ELEMENTS OF BIOLOGY 



metabolic phenomenon, analogous to the series of metabolic steps 

 in the origin of proteins in a cell from the crude proteins of the 

 food. This point of view places emphasis upon the metabolic proc- 

 esses of differentiation; preformationism emphasizes the physico- 

 chemical and organismic organizations that characterize develop- 

 ment. Both are associated in the developmental process. 



Suggested Readings 



Wilson, E. B.: The Cell in Development and Heredity. The Macmillan 

 Company, 1925. 



Sharp, L. W.: Introduction to Cytology. McGraw-Hill Book Company, 

 1921. 



Morgan, T. H.: The Theory of the Gene. Yale University Press, 1929. 



Morgan, T. H., Sturtevant, A. H., Muller, H. J., and Bridges, C. S.: 

 The Mechanism of Mendelian Inheritance. Henry Holt and Com- 

 pany, 1922. 



Guyer, M. F.: Being Well-born. Bobbs-Merrill Company, 1927. 



Gates, R. R.: Heredity in Man. The Macmillan Company, 1930. 



East, E. M., and Jones, E. F.: Inbreeding and Outbreeding; Their Ge- 

 netic and Sociological Significance. W. W. Norton and Company, 



1930. 

 Morgan, T. H.: "The Rise of Genetics." Science, Vol. 76, No. 1969, 



1970, September, 1932. 

 Popenoe, P., and Johnson, R. H.: Applied Eugenics. The Macmillan 



Company, 1931. 



