CONTENTS 



2. Segregation and Isolation of Different 

 Substances in Cells 



a. By Protoplasmic Movements 



b. By Differential Cell Divisions 



CHAPTEE III. PHENOMENA OF INHERITANCE 



A. OBSERVATIONS ON INHERITANCE 

 Individuals and their Characters 

 Hereditary Resemblances and Differences 



I. Hereditary Resemblances 



1. Racial Characters 



2. Individual Characters 



a. Morphological Features 

 y b. Teratological and Pathological Pe- 



culiarities 



c. Physiological Peculiarities 



d. Psychological Characters 

 II. Hereditary Differences 



1. New Combinations of Characters 



2. New Characters or Mutations 



3. Mutations and Fluctuations x 



4. Every Individual Unique 



B. STATISTICAL STUDY OF INHERITANCE 



1. Galton's "Law of Ancestral Inheri- 

 tance" 



2. Galton's "Law of Filial Regression" 



C. EXPERIMENTAL STUDY OF INHERI- 

 TANCE 



I. Mendelism 



1. Results of Crossing Individuals with 

 one pair of contrasting characters 



