CONTENTS 



B. EXPERIMENTAL MODIFICATIONS OF 

 DEVELOPMENT 



I. Developmental Stimuli 



1. Physical Stimuli 



2. Chemical Stimuli 



II. Developmental Responses 



Dependent upon (a) Nature of Organism, 

 (b) Nature of Stimulus, (c) Stage of De- 

 velopment 



1. Modifications of Germ Cells before 

 Fertilization 



2. During Fertilization 



3. After Fertilization 



C. FUNCTIONAL ACTIVITY AS A FACTOR 

 OF DEVELOPMENT 



D. INHERITANCE OR NON-INHERITANCE 

 OF ACQUIRED CHARACTERS 



E. APPLICATIONS TO HUMAN DEVELOP- 

 MENT: EUTHENICS 



CHAPTER V. CONTROL OF HEREDITY: EU- 

 GENICS 

 A. DOMESTICATED ANIMALS AND CULTI- 

 VATED PLANTS 

 I. Influence of Environment in Producing 

 New Races 

 II. Artificial Selection 



1. The Methods of Breeders 



2. How has Selection acted? 

 III. Methods of Modern Genetics 



1. Mendelian Association and Dissocia- 

 tion of Characters 



2. Origin of Mutations 



