580 



Subject Index 



Colchicum, 473 

 Collochores, 216 

 Color, animals, 313, 314 

 barley, 247, 331 

 bean, 323, 324 

 cat, 278, 279 

 cotton, 131, 132 

 daisy, 328, 329, 330 

 Delphinium, 237, 238, 239 

 Drosophila melanogaster, body of, 

 18, 21, 27, 173 

 eyes of, 21, 28, 103, 104, 134, 

 191, 192, 205, 206, 307, 308, 

 309, 335, 337, 425 

 flax, 323 

 fowl, 325, 326 

 Fragaria, 462 

 guinea pigs, 114, 115, 165, 278, 



323 

 maize, anthocyanin, 154, 155, 157, 

 158, 164, 166 

 fruit, 156, 175, 203, 236, 237, 



327, 329, 443 



purple, 124, 127, 128, 129, 132, 



133, 241, 280, 320 

 seedlings, 136, 175 

 mouse, 278, 323, 336, 355 

 Nemesia strumosa, 35, 113, 116, 



117, 120, 121, 275, 276 

 Nicotiana, 108, 112, 113, 275, 353 

 Oenothera, 161, 320 

 plants, 312, 313 

 Portulaca, 258, 259 

 rabbit, 278, 313, 355 

 red clover, 275 

 snapdragon, 323 

 squash, 321, 325 

 Streptocarpus, 312, 313 

 sweet pea, 163, 326, 327, 328 

 wheat, 331, 336, 342, 464 

 Combined ratios, method of, 128, 



129, 137 

 Complementary genes, 228, 326, 327, 



328, 329, 335, 499, 500, 501 

 Complexes, 427, 534, 536, 537 

 Compound crossing over, 212 

 Conifers, 438 



Conjunctive segments, 215 



Continuous variation, 346, 347, 358 

 Contributing genes, 342, 346, 347, 



351, 371 

 Cotton, allopolyploids in. 458 

 spotted leaves, 131, 132 

 white vs. brow^n lint, 131, 132 . 

 Coupling, 154, 155, 156, 157, 161, 



166, 178 

 Cousins, marriage of, 367. 369, 373 

 Cranberry, 478 



Crepidula plana, 302, 303, 304 

 Crepis, chromosomes in, 452, 532, 

 533 

 karyotypes in, 532, 533 

 reciprocal translocations in. 533 

 reduction in chromosome number 



in, 532, 533 

 speciation in, 531, 532, 533 

 triploids in, 440. 462. 463 

 Crepis capillaris, 462, 4^3, 532 

 Crepis conyzaejolia, 532 

 Crepis juliginosa, 532, 533 

 Crepis kashmirica, 532 

 Crepis leontodontoides, 532 

 Crepis Mungierii, 532 

 Crepis neglecia, 533 

 Crepis sibirica, 532 

 Crepis Sufjreniana, 532 

 Crepis tectorum, 462, 4^3 

 Crisscross inheritance, 97 

 Crossing over, 57, 148, 150, 151, 152, 

 421 

 between chromatids, 206 

 between sister chromatids, 207 

 between the X and Y chromo- 

 somes, 197, 198, 214 

 compound, 212 

 determination of per cent of from 



Fo data, 159 

 double, 173, 174, 175, 177, 178, 179, 



180, 210 

 effect of age on, 167 

 effect of environment on, 167 

 effect of on Fo ratios, 157, 158, 



160, 161, 162 

 exactness of, 208, 209, 210 

 genetical and cytological, 189, 202, 

 203, 204 



