CONTENTS 



CHAPTER II. CELLULAR BASIS OF HEREDITY 

 AND DEVELOPMENT 



A. INTRODUCTORY 



1. Definitions 



2. The Transmission Hypothesis 



3. Germinal Continuity and Somatic Dis- 

 continuity 



4t. The Units of Living Matter 

 5. Heredity and Development 



B. THE GERM CELLS 



1. Fertilization 



2. Cleavage and Differentiation 



3. The Origin of the Sex Cells 



a. The Division Period 



b. The Growth Period 



c. The Maturation Period 



4. Sex Determination 



C. THE MECHANISM OF HEREDITY 



I. The Specificity of Germ Cells 

 II. Correlations between Germinal and So- 

 matic Organization 



1. Nuclear Correlations 



2. Cytoplasmic Correlations 



a. Polarity 



b. Symmetry 



• c. Inverse Symmetry 



d. Localization Pattern 



D. THE MECHANISM OF DEVELOPMENT 



1. The Formation of Different Substances 



