XIV 



List of Ilhtstrations 



34. 



35- 

 36. 



37. 

 38. 



28 



FIGURE 



15. Diagram of Fo showing ratio 9:3:4 



16. Diagram of Fg showing ratio 9:7 



17. Diagram of Fo in Sweet Pea showing ratio 27:9 



18. Pedigrees of eye-colour in Man 



19. Pollen grains of Sweet Peas .... 



20. Heredity of horns in Sheep .... 



21. Heredity of a peculiar form of curly hair 



22. Descent of congenital lock of white hair . 



23. Brachydactylous hands ..... 



24. Skiagram of hands ...... 



25. Hands of brachydactylous child 



26. Pedigree of brachydactylous family . 



27. Descent from brachydactylous members 



28. Drinkwater's pedigree of brachydactyly 



29. Descent of prae-senile cataract . . - . 



30. Another cataractous family ..... 



31. Descent of stationary night-blindness 



32. Descent of Colour-blindness ..... 



33. Ideal Scheme of descent of simple sex-limited condition 



e.g. horns of Sheep ...... 



Tentative representation of descent of Colour-blindness 

 Polish X Rivet Wheat ....... 



Seeds of Polish x Rivet Wheat ..... 



Reversion in height of Sweet Peas .... 



Two types of dwarf Sweet Peas .... 



between pp. 



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