Shasta daisy 80 



Sheep 34, 79, 114 



Shepherd's purse 41. 103 



Shull, G. H 81, 97, 103 



Simplex 95 



Skew curves 27 



Skin color 103 



Somatic characters 57, 58 



Species, elementary . . 8, 20, 66 



" Linnaean f 



" origin of 5, 13 



Spencer, Herbert 49 



Spermatocytes 43. 44, 135 



Spermatogenesis 43, 135 



Spermatozoa 40, 44, 135 



Sperm cells 40, 44 



Sports 2:: 



St. Hilaire, G 10, G4 



Standard deviation 16 



Statistical method 46, 47 



Sterility lf» 



Strawberry 38 



Struggle for existence, 14, 70 



Suffolk sheep 114 



Sugar beets 27, 155. 156 



Supplementary factors .... 107 



Survival of the fittest 15, 19 



Sweden, Grain breeding 



in 158-159 



Sweet pea 38, 104 



Swine 34. 79 



Synapsis 136-137 



T 

 Telegony 61 



Temperature 31, 14f. 



Thomson, J. A., 20, 45, 47, 



59, 60, 61 



Tower. W. L 61, 74 



Transmission of characters 



52-61 



Treviranus ^^ 



Trihybrids ^ 87 



Trotting records 62 



Tuberculosis 60 



Twins ^46 



U 



Unfixable types 102, 128 



Unit characters, 49, 50, 73, 82 

 Use and Disuse theory, 



11-13, 32, 58 



w 



Walnuts, hybrids 79, SI 



Webber, H. ,J.. 28, 30, 79, 154 



Weismann 43, 53, 55 



Weismannism 43 



Wentworth 115 



Wheat 35, 36, 10? 



" breeding in Canada... 157 

 in Sweden.... 158 



Wilson, Prof 100 



WZ type of inheritance, 115, 142 



X 



X chromosome Ill, 142 



Xenia 30 



XY type of inheritance 111, 142 



Y 



y chromosome 142 



Z 



Zero family 166 



Zygote «4. 96, 130 



Z chromosome 142 



185 



