ILLUSTRATIONS 



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 illustrating Inheritance of Fowls' Combs 34 



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



7. Diagram of Fj Generation resulting from Cross 



between two White Sweet-Peas . . . 43— 



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



