S8 MENDELISM chap, v 



colour and hairiness in stocks. It is evident, however, 

 that the conception of the interaction of factors, besides 

 clearing up much that is paradoxical in heredity, prom- 

 ises to indicate lines of research which may lead to valu- 

 able extensions in our knowledge of the way in which 

 the various parts of the living organism are related to one 

 another. 



