ILLUSTRATIONS 



PLATES 



Gregor Mendel 



I. Rabbits . 



II. Sweet Peas 



III. Sheep . 



IV. Sweet Peas 

 V. Fowls 



VI. Butterflies 



Frontispiece 

 To face 60 

 " 64 

 « 78 

 " 80 

 " 107 

 " 146 



FIGURES IN TEXT 



FIG. 



1. Scheme of Inheritance in simple Mendelian Case . . 21 



2. Feathers of Silky and Common Fowl . . . . 30 



3. Single and Double Primulas . . . . 31 



4. Fowls' Combs . . . . . . . . 32 



5. Diagram of Inheritance of Fowls' Combs . yj 



6. Fowls' Combs ......... 40 



7. Diagram of F 2 Generation resulting from Cross between 



two White Sweet Peas 46 



8. Diagram illustrating 9 : 3 : 4 Ratio in Mice ... 52 



9. Sections of Primulas . . . . , . 55 



