ILLUSTRATIONS 



FIGURES IN TEXT 



FIG. 



1. Scheme of Inheritance in simple Mendelian Case . 



2. Feathers of Silky and Common Fowl . 



3. Single and Double Primulas .... 



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



5. Diagram illustrating Inheritance of Fowls' Combs 



6. Fowls' Combs .....•• 



7. Diagram of F2 Generation resulting from Cross 



between two White Sweet-Peas 



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



xi 



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27 



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30 

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