THE MECHANISM 



OF 



MENDELIAN HEREDITY 



BY 



T. H. MORGAN 



PROFESSOR OF EXPERIMENTAL ZOOLOGY 

 COLUMBIA UNIVERSITY 



A. H. STURTEVANT 



CUTTING FELLOW, COLUMBIA UNIVERSITY 



H. J. MULLER 



ASSISTANT IN ZOOLOGY, COLUMBIA UNIVERSITY 



C. B. BRIDGES 



FELLOW IN ZOOLOGY, COLUMBIA UNIVERSITY 



NEW YORK 

 HENRY HOLT AND COMPANY 



