342 



THE THEORY OF THE GENE 



ring dove, 272. 



Rosenberg, 165, 166, 167, 191. 



roses, 158-165. 



Rosa, 163. 



rose comb, 72, 73, 74. 



rotifer, 147, 214, 233, 234, 235. 



round worms, 206. 



Rumex, 212, 213. 



rye, 150, 158. 



S 



Saccharum, 170. 



Sacculina, 252. 



Sakamura, 152. 



Salamander, 275. 



Santos, 212. 



Sax, 152, 155, 156. 



Schaffner, 276. 



Schleip, 231, 232. 



Scbmidt, 128, 222, 226. 



Schrader, 148. 



scute, bristles, 86. 



sea urchins, 206. 



Seller, 105, 209, 210, 220, 245, 



303. 

 semi-gigas, 70. 

 semi-lata types, 70. 

 sesquiplex mutant type, 189. 

 sex, 199-218, 219. 

 sex-chromosomes, 32, 52-55, 199- 



218. 

 sex-determination, 219. 

 sex-linkage, 52. 



sex-linked inheritance, 207, 208. 

 sex reversals, 250-280. 

 Sexton, 253. 

 sheep, 249. 

 Shiwago, 206, 208. 

 Shull, A. P., 149. 

 Shull, G. H., 71, 189, 190. 

 single comb, 73, 74. 



Sinnott, 180. 



Smith, G., 251-253. 



snail, 99. 



snapdragon, 97. 



Solenobia, 210. 



Solenum, 112-114. 



species, 68. 



"Species and Varieties," 68. 



Spemann, 139, 140. 



Spencer, Herbert, 28. 



spider crab, 251. 



sporophyte, 125, 126. 



stable type, 124. 



Stevens, 208. 



Stockard, 296, 297. 



stone fly, 255. 



Stomps, 70, 131. 



Sturtevant, 88-91, 101, 102, 243. 



sugar cane, 170. 



superfemale, 56, 242. 



supermale, 136, 241. 



sweet peas, 10, 11, 36, 37. 



Swingle, 258. 



Tackholm, 158-163. 



tadpole, 256-265. 



Tahara, 167-169. 



Talaeporia, 210. 



Tandler, 247. 



Taylor, 170. 



teosinte, 123, 124, 187, 196. 



tetraploids, 105-130. 



tetra-type, 176. 



Thelia, 252. 



theories of heredity, 26-31. 



theory of the gene, 25. 



thrips, 149. 



Tischler, 170. 



toad, 266. 



tobacco, 96. 



