578 



Subject Index 



Barley-iye hybrids, 444, 445 

 Barriers, 402, 518, 519, 532, 536 

 ecological, 520, 521 

 removal of, 520, 521, 536 

 Bean, 27, 369, 370 

 Bee, 67, 502 

 Beetles, 523 

 Bihio hortulanus, 75 

 Binomial theorem, 110, 111, 112, 113, 



120, 140, 345 

 Biotype, 371, 374, 378, 379, 384, 459, 



536 

 Birds, 70, 71, 281, 523 

 Biscutella laevigata, 454 

 Bisexual flowers, 502 

 Bivalent chromosomes, 57 ff., 210, 



416, 417, 441, 442, U6, W, 



U8, 457 ff., 460, 463 

 Blood groups, 282 ff. 



in human beings, A-B, 284, 2S6, 



287, 288, 289, 290 

 Blood types, in human beings, M-N, 



290, 291 

 in human beings, Rh, 289, 291, 



292, 293, 294, 295, 296, 297, 



298 

 Bombyx, 450 

 Bonellia, 495 

 Bouquet stage, 55 

 Brachystola, magna, 134 

 Breeding true, 371 

 Bromus arizonicus, 467 

 Bromus carinatus, 467 

 Brother-and-sister matings, 367, 368, 



369, 373 

 B-type chromosomes, 411 

 Bud mutation, 234, 235 

 Butterflies, 70, 481 



Cabbage, 11, 459 



Cabbage-radish hybrid, 459 



Callus formation and polyploids, 



477, 478 

 Capsella (Bursa), 126 



bursa-pastoris, 88, 330, 331, 464 



djurdjurae, 464 



grandiflora, 62, 82, 272, 464 



Heegeri, 330, 331, 464 



Capsella (Bursa) (continued) 



ocddentalis, 464 



orientalis, 464 



penarthae, 464 



rubella, 62, 464 



tuscaloosae, 464 



Viguieri, 82, 464 

 Carpellate flowers, 503 

 Cat, 278, 279 

 Catalyst, 307, 311 

 Catostomidae, 530 

 Cattle, Africander, 382 



Brahman, 382 



horns in, 108, HI. 112 



sex reversal in, 494, 495 

 Cell, 1, 2 



dividing, Off., 8, 10, 13 



embryonic, 3, 4 



metabolic, 2 



parenchyma, 4 



resting, 2 ff. 



somatic, 13 

 Cell polarity, 317 

 Cell wall, 3, 4 



Centric fragment, 394, 411, 429, 441 

 Centriole, 5 



Centromere, 7 ff ., 16. 53 ff.. 77, 124, 

 125, 149, 191, 216. 224, 393, 418 



breaking of, 395, 429 



distance of genes near, 191, 194 



of chromosome IV of Drosophila 

 vielanogastcr, 194, 196 

 Centrosome, 3, 13 

 Centrosphere, 5 

 Chance, 109, 114, 136, 434 



importance of in locating genes 

 on chromosomes, 171, 174 

 Character, 19 

 Character index, 528 

 "Checkerboard," 83, 127, 128, 137, 



138, 139, 158, 323, 324, 538 

 Chemical nature, of chromosome, 

 220 



of genes, 230 

 Chemicals, effect on crossing over, 

 167 



