Chapter III

THE FACTORIAL THEORY OF HEREDITY
AND THE COMPOSITION OF THE GERM PLASM

1. THE CELLULAR BASIS OF ORGANIC EVOLUTION
AND HEREDITY 89-98

2. THE MECHANISM OF MENDELIAN HEREDITY
DISCOVERED IN THE BEHAVIOR OF THE
CHROMOSOMES 98-102

3. THE FOUR GREAT LINKAGE GROUPS OF DROSOPHILA
AMPELOPHILA 103-118
a. Group I. 104-109
b. Group II. 109-112
c. Group III. 112-115
d. Group IV. 115-118

4. LOCALIZATION OF FACTORS IN THE CHROMOSOMES 118-142
a. The Evidence from Sex Linked Inheritance 118-137
b. The Evidence from Interference 137-138
c. The Evidence from Non-Disjunction 139-142

5. HOW MANY GENETIC FACTORS ARE THERE IN
THE GERM-PLASM OF A SINGLE INDIVIDUAL? 142-143

6. CONCLUSIONS 144

CHAPTER IV
SELECTION AND EVOLUTION

1. THE THEORY OF NATURAL SELECTION 145-161

2. HOW HAS SELECTION IN DOMESTICATED ANIMALS
AND PLANTS BROUGHT ABOUT ITS RESULTS? 161-165

3. ARE FACTORS CHANGED THROUGH SELECTION? 165-187

4. HOW DOES NATURAL SELECTION INFLUENCE
THE COURSE OF EVOLUTION? 187-193

5. CONCLUSIONS 193-194

INDEX 195-197

* * * * *