CONTENTS ix 



Paoi 



1 The gene ae a Bide chain of a molecule 300 



H. ETriesen's theory of chain mutation 302 



6. Outlook upon the theory of the gene of tomorrow 303 



A . The position effecl : ! (| I 



B. Interpretation in terms of genes 308 



C. Is the theory of the gene still valid? 309 



Bibliography 317 



Aithok Index 363 



Subject Index 369 



