THE MECHANISM 
OF 
MENDELIAN HEREDITY 
BY 
T. H. MORGAN 
PROFESSOR OF EXPERIMENTAL ZOOLOGY 
COLUMBIA UNIVERSITY 
A. H. STURTEVANT 
RESEARCH ASSISTANT, CARNEGIE INSTITUTION 
H. J. MULLER 
ASSOCIATE PROFESSOR OF ZOOLOGY 
UNIVERSITY OF TEXAS 
C. B. BRIDGES 
RESEARCH ASSISTANT, CARNEGIE INSTITUTION 
REVISED EDITION 
NEW YORK 
HENRY HOLT AND COMPANY 
