Contents 



CHAPTER PAGE 



1. Breeding and Heredity 1 



2. The Mendelian Phenomena of Inheritance ; the 



Result of Crossing Tall with Dwarf Peas . 12 



3. The Inheritance of Four other Characters of the 



Culinary Pea studied by Mendel . . .21 



4. General Characteristics of the Mendelian Phe- 



nomena Illustrated by the Case of the An- 

 dalusian Fowl and the Inheritance of Eye- 

 Colour in Man 33 



5. The Inheritance of the Characters of the Seed 



IN THE Culinary Pea ..... 50 



6. Throwing Back, or Reversion .... 72 



7. The Relation between Characters belonging to 



Distinct Pairs 93 



8. The Interpretation of Reversion . . .114 



9. The Nature of the Mendelian Pair of Characters 124 



10. The carrying out of a Breeding Experiment with 



A Plant Ul 



11. Mendel's Explanation of His Results. . . 160 



12. Antecedents and Fate of Mendel's Discovery , 186 



13. Theory to Account for the Results which follow 



a Cross involving Two Pairs of Characters . 203 



