ILLUSTRATIONS 



PLATES 



PLATE PAGE 



Gregor Mendel . . . . . Frontispiece 



I. Rabbits ....... To face 55 -' 



II. Sweet Peas ..... ,, 58-" 



III. Sheep . . . . . . 72 



IV. Sweet Peas . . . . . ,, 74 s 

 V. Fowls ...... ,, 97 



VI. Butterflies ...... ,, 134^ 



FIGURES IN TEXT 



FIG. 



1. Scheme of Inheritance in simple Mendelian Case . 19 



2. Feathers of Silky and Common Fowl . . . 27 



3. Single and Double Primulas .... 28 



4. Fowls' Combs . . . . . . . 30 



5. Diagram of Inheritance of Fowls' Combs . . 34 



6. Fowls' Combs . . . . . . . 36 



7. Diagram of F 9 Generation resulting from Cross 



between two White Sweet Peas . . . 43 



8. Diagram illustrating 9:3:4 Ratio in Mice . . 48 



9. Sections of Primulas . . . . . . 51 



