392 



INDEX 



Daphnia, 32, 213, 255. 

 Darwin, Charles, 7, 48, 55, 83, 113, 228. 

 Darwin, Erasmus, 9. 

 Davenport, 271, 275, 277, 284. 

 Davis, 80. 

 Delage, 34. 



Determiners, 48, 49, 50, 53, 54. 

 Detlefsen, 179. 

 Diffliigia, 209. 

 Dihybrid ratio, 107, 116. 

 Dilute pigmentation, 127. 

 Disease, inheritance of, 29. 

 Dogs, unit-characters of, 138. 

 Domestication, changes under, 14. 

 Dominant, 88. 

 Drinkwater, 190. 



Drosophila, 156, 176, 180, 188, 219, 224, 

 230, 249. 



eye colors of, 219. 

 Ducks, size inheritance in, 197. 



East, 193, 199, 210, 242, 244. 



Egg-cell, 98. 



Egypt, royal family of, 227. 



Elementary species, 74. 



Embryology, 12. 



Emerson, 199, 211, 224. 



Environment, direct effect of, 20. 



Epilepsy, 30, 284. 



Eugenics defined, 3. 



Eugenics Laboratory, 271. 



Eugenics Record Office, 271. 



Evening primrose, 49, 75, 220. 



Evolution defined, 4, 7. 



history of, repeated in devel- 

 opment, 13. 



Extension factor, 188. 



Factor, modifying, 189. 



multiple, 192. 

 Farabee, 190. 

 Feeble-mindedness, 285. 

 Ferroniere, 32. 

 Filial generation, 100. 

 Fischer, 34, 269. 

 Fixation of new varieties, 95. 

 Flower colors, 148. 



forms, 150. 



Fluctuations, 71, 78. 

 Free martin, 252. 

 Fruit colors, 151. 



Galapagos islands, 14. 



Gall insects, 52. 



Gallus bankiva, 145. 



Galton, 3, 9, 26, 56, 71, 246,, 295. 



Galton's law of ancestral heredity, 239, 246. 



Gamete, 98. 



Gates, 50. 



Gene, 99. 



Genes, linear arrangement of, 168. 

 nature of, 177. 



Genetic changes, 205. 



in bisexual reproduc- 

 tion, 219. 



in parthenogenesis, 

 212. 

 in self-fertilization, 215. 



Genetics defined, 3. 



Genotype, 102. 



Geographical distribution, 13. 



Geological succession, 13. 



Germ-cells, 23, 47. 



Germinal selection, 54. 



Gipsy moth, 33. 



Goddard, 285. 



Goodale, 251. 



Goss, 86. 



Gould, 253. 



Gradation of organisms, 12. 



Graft hybrid, 23. 



Greek philosophers, 8. 



Gross, 202. 



Guinea-pig, 24, 30, 88, 91, 114, 122a, 187. 



Gynandromorph, 249. 



Haemophilia, 162. 



Hair form, inheritance of, 275. 



Haldane, 170, 173. 



Harrison, 23. 



Hegner, 51, 209. 



Height of Harvard students, 57, 61. 



Heron, 281, 283. 



Hermaphroditism, 261. 



Hertwig, 45. 



Heterosis, 242. 



