163 HEREDITY AND ENVIRONMENT 



II. Correlations Between Germinal and 

 Somatic Organization 



All the world Imows that the organization 

 of the germ is not the same as that of the de- 

 veloped animal which comes from it, and yet 

 the specificity of the germ indicates that there 

 must be some correlation between the germinal 

 and the developed organization; in short, 

 there is not identity of organization but cor- 

 relation of organization between the germ and 

 the adult. What correlations are known to 

 exist between the oosperm and the developed 

 animal? 



1. Nuclear Correlations, — Many biologists 

 maintain that the nucleus and more particu- 

 larly the chromosomes are the exclusive seat 

 of the "inheritance material" and that all the 

 "determiners" of adult characters are located 

 in them. Against the extreme form of this 

 theory many general and specific objections 

 may be urged. General objections are based 

 upon the consideration that the entire cell, 

 cytoplasm as well as nucleus, is concerned in 



