668 



INDEX 



SPINDLE— (co«^rf.)- 

 movement of, 29 



multipolar, 523, 535 



in polyploids, 129 



structure, 520 at sqq. 



tri-polar, 405 

 SPINDLE ATTACHMENT, see 



centromere, 

 spindle fibre, 26, 521 

 SPIRAL, major, loi. 485, IV, XIII 



minor, loi, 485 



molecular, 483 



relic, 33, 93. 311. 483. H 

 See also coiling, 

 spiral structure, 31 



See also coiling. 

 SPIRALISATION, 25, 52, 483 et 

 sqq., 562 



See also coiling. 

 SPIREME, 24 



continuous, 311 

 Spirogyra, 20, 21, 307 

 Spironema, 80, 145, 507 

 split, see chromosome division. 

 SPORE, 5, 6, 449 



segregation, 248 

 SPOROPHYTE, 6 

 Sporozoa, 6 

 Stadler, 422, 555 

 staining reaction, 307, 315 



centromere, 536, XV 



centrosome, 533 

 statistics, of chiasma frequency, 169, 

 281 et sqq., 400 



of chromosome numbers, 22g 



of crossing-over, 281 et sqq. 



of fragment pairing, 146 



of gametes of triploids, 318 



of natural populations, yo 



of numbers of species, 230, 231 



of pairing frequency, 219, 400 



of pairing in hybrids, isg, 174, lys 



of polyploid pairing, 126 



of terminalisation, 508, 510, 513 



of types of ring, 349 

 See also correlation. 

 Stauroderus, 261 

 Stenohothrus, 96, XV 



chiasma frequency, 99, 294 



chromosome size, 83 



coiling, 487 



crossing-over, 553 



deficiency, 162 



differential condensation, 310 



duration of meiosis, 31 



Stenohothrus — (conid.). 



terminalisation, 575 

 See also Chorthippus. 

 sterility, cross-, 135 



self-, see incompatibility. 



of tetraploids, 187 



of triploids, 422 

 Stern, 277 



Strasburger, 572, 581 

 STRUCTURAL CHANGE, 59, 77, 

 167 



classification, 69, 554, 556 



dyscentric, 55y 



eucentric, 55y 



and genetic change, 197 



induced, 422 et sqq. 



inter-genic, 333 



mechanism of, 554 et sqq. 



natural, 419 et sqq. 



secondary, 273, 275, 280, 351, 421 



and spiralisation, 489 



symmetrical, 555, 556, 55y 



time of, 71 



See also structural hybrid. 

 STRUCTURAL HYBRID, 135 et 

 sqq., 260 et sqq. 



crossing-over, 286 



dyscentric, 265 



and sex, 363 

 Sturtevant, 180, 252 

 substrate, 315, 331 



effect, 497, 498, 546 

 surface charge, see electric field. 

 Surirella, 48 

 SYNDIPLOIDY. 65 



See also somatic doubling. 

 Syrbula, 294 

 Syringa, 41 y 

 systematics, 75 



Tackholm, 460, 572 

 TalcBporia, 368 

 tapetum, 63 

 Taraxacum, 438 et sqq., 457 



secondary pairing, 242 



syndiploidy, 66 

 Taxus, 146, 390 

 technique, 569 



for spirals, 487 et sqq. 

 teleology, 197, 253 



TELOPHASE, meiosis, 305 ; see 

 also interphase. 



mitosis, 23, 30, 33 



spirals, 4gi 

 Tenebrio, 307 



