XIV
Economical 153

CHAPTER XV
Man 170

APPENDIX 187

INDEX 191

* * * * *

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ILLUSTRATIONS

PLATES

PLATE PAGE

Gregor Mendel _Frontispiece_

I. Rabbits _To face_ 60

II. Sweet Peas " 64

III. Sheep " 78

IV. Sweet Peas " 80

V. Fowls " 107

VI. Butterflies " 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 37

6. Fowls' Combs 39

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

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10. Small and Large-eyed Primulas 56

11. Diagram illustrating Reversion in Pigeons 67

12. _Primula sinensis_ x _Primula stellata_ 68

13. Diagram illustrating Cross between Dominant and
Recessive White Fowls 72

14. Bearded and Beardless Wheat 75

15. Feet of Fowls 76

16. Scheme of Inheritance of Horns in Sheep 76

17. _Abraxas grossulariata_ and var. _lacticolor_ 99

18. Scheme of Inheritance in _Abraxas_ 102

19. Scheme of Inheritance of Si