x CONTEXTS 



CHAP. 



duction of Colour. — Colour in Animals ; some colours 

 'epistatic 5 over others. — Flower-colours; Reversion on 

 crossing. — The nature of albinism. — More complex eases 

 of interrelation ; Stocks, Primulas . . . 71 



VII. Some Disputed Questions. Mendelian segregation. — 



Inheritance of acquired characters. — Indirect and ex- 

 perimental evidence. — Telegony. — Maternal Impres- 

 sion 85 



VIII. Heredity in Man. Physical and Mental Characters. — 



Diseases. — Mendelian Characters ; Eye-colour, Brachy- 

 (lactyly. abnormalities of the Eye. — Xon-Mendelian 

 characters ; Skin and Hair-colour. — Importance of 

 Heredity in relation to Sociology ... 99 



Appendix I. Historical Summary of Theories of Heredity. 

 Lamarck. — Darwin and the Theory of Pangenesis. — 

 Weismann's Theory of Germ-Plasm . . . 116 



Appendix II. The Material Basis of Inheritance. The 

 Nucleus and Chromosomes as possible ' bearers ; of 

 Heredity. Behaviour of Chromosomes in Germ-cell 

 formation . .126 



Literature List ........ 132 



Glossary 135 



Index ... 139 



