INDEX 



657 



DIPLOID, 5, 6 



constitution, 61 



functional, 184 et sqq., 214 

 DIPLOIDISATION, 8, 10 

 DIPLOPHASE, 10 

 DIPLOTENE, 87 et sqq.. 259, 287, 



550 et sqq. 

 Diptera, 7, 367, 497 



salivary glands, 175 et sqq. 

 DISJUNCTION, 113 etsqq., 132 

 distribution, see chromosomes. 

 Dobzhansky, 371, 386, 389, 398, 410 



et sqq. 

 donation, 430 

 Dorstenia, 402 

 Draba, 22y 



See also Erophila. 

 Drosera, 83, 41'] 



hybrid, 205 

 Droseraceae, 79, 84 

 Drosophila, VII 



abnormal meiosis, 372 



coiling, 492 



crossing-over, 250, 252, 289 et sqq 



heterochromatin, 309 



intersexes and supersexes, 385 



inversions, 265, 272 et sqq. 



irradiation, 422 et sqq. 



nucleoli, 305, 306 



salivary glands, 176, 177, 178, 180, 

 181 



sex chromosomes, 358 et sqq. 



somatic pairing, 236, 497 et sqq. 

 Drosophila Junebris, 330 

 Drosophila melanogaster, attached X, 

 285 



attached XY, 277 



bar eye, 333 



cell size, 221 



chromosome map, 295 



diminution, 58 



gynandromorph, 68 



interchange, 160 



interference, 551 



monosomic, 316 



mosaic, 68, 425, 448 

 haploid, 385 



nucleoli, 40 



polyploid cells, 63 



reduplications, 317 



ring chromosome, 74 



sex chromosomes, 330 



tetraploidy, 66 



triploidy, 67, 216. 284 



trisomic, 3ig 



Drosophila melanogaster — (contd.) . 



types of complement, 386 



viability of deficiencies and 

 reduplications, 321 

 Drosophila miranda, 367, 389 

 Drosophila psendo-obscura, 79 



geographic races, 181 



hybrid, 181 



meiosis, 371 



non-pairing, 400, 405 



nucleoli, 40 



polymitosis, 398, 535 



sex chromosomes, 181 



tetraploid meiosis, 125 

 Drosophila simulans, 179, 180, 388 



abnormal mitosis, 396 

 Drosophila virilis, 388 

 Drosophyllum, 83 

 DUPLICATION, 141, 181, 272. 278 



and balance, 327 



buffer effect, 317 



haploid, 398 

 DYSCENTRIC HYBRID, see 



structural hybrid. 

 Dzierzon, 249, 376 



Echinodermata, 434, 466 



double fertilisation, 64 



polyploidy, 63 

 Ectocarpus, 17 

 egg-cell, 7, 26, 94, 103 



unreduced, 189 et sqq. 

 Elatostema, 451 

 electric field, 522 

 electric potential differences, 561 

 electric surface charge, 315, 499 et 

 sqq., 503, 519 et sqq. 



of sex chromosomes, 375 



and spiralisation, 560 

 elimination, of cells, 555 



of gametes, 219, 316 et sqq. 



at mitosis, 555 



of zygotes, 240, 318 et sqq. 

 See also chromosome, 

 embryonic membranes, 50, 63 

 EMBRYO-SAC, 10 et sqq., 11, 437. 

 454 



competition, 340 



differential viability, 316 et sqq. 

 Empetrum, 67, 242, 364 

 Enchenopa, 313, 368 

 endogamous group, 478 

 endomixis, 50 

 endosperm, 11, 50, 62, 67, 438, 441 



X-rayed, 431 



