INDEX 



567 



y-chromosome, 304, 378 /. 

 Yamagiwa, 187 



Yamaha, 5, 27, 120, 164, 165, 185 

 Yamamoto, 121, 129, 390, 395 

 Yamanouchi, achromatic figure, 159, 165 



apogamy, 403 



chondriosomes, 86 



eyespot, 66 



meiosis, 280 



spermatogenesis, 204 



syngamy, 227, 228, 229, 233 

 Yampolsky, 388, 396 

 Yasui, 416, 417 

 Yatsu, 154, 412 

 Yazawa, 201 

 Yeast, 96, 167 

 Yocum, 10, 223 

 Yolk, 78, 88, 100, 213 

 Young, R. A., 32, 188 

 Yuasa, 204, 205 



Z 



2-chromosome, 379, 380 



Zacharias, 25, 56, 57 



Zade, 342 



Zamia (cycad), 199, 234 



Zanardinia (brown alga), 66, 280 



Zattler, 386, 408 



Zea (maize), abnormal mitosis, 186, 187 



chiasma, 271 



chromomeres, 142, 143, 259, 274, 276 



chromosome set, 298 



chromosomes, 115, 118, 119, 121, 123, 135, 140, 

 259, 274, 276 



crossing-over, 302, 303, 305 



cytoplasmic heredity, 419 



endosperm, 355 



heteroploidy, 342, 343, 345, 346 



inversion and deletion, 318, 319, 320 



liguleless leaves, 299 



linkage, 296, 300 



linkage groups, 296, 297, 298 



linkage map, 299 



matrix, 120, 136 



meiosis, 259, 261, 265, 273, 274, 276 



Zea (maize), monoploid sporophyte, 356 



non-disjunction, 345 



non-homologous association, 276 



nucleolus, 119, 120 



plastid development, 69 



pollen characters, 30, 308 



root tip, 5 



reciprocal translocation, 327, 329-334, 330, 832 



silkless ears, 299 



spindle, 164 



stomates in polyploids, 358 



syngamy, 237, 238 



temperature effects, 317, 345 



tetraploidy, 345 



translocation, 316, 317, 321, 322 



triploidy, 346, 347, 352, 354 



trisomic inheritance, 297, 354 



variegation, 415-417 



Zea-Euchlwna hybrid, 360, 371 

 Zebrina (angiosperm), 261, 329 

 Zeleny, 412 

 Ziegenspeck, 172, 177 

 Zimmermann, A., 25, 66, 154 

 Zimmermann, W., 31, 68, 111, 159, 279 

 Zirkle, chondriosome, 90, 91 



chromosome, 133 



early hybridizers, 436 



fixation, S 



nucleolus, 68, 118, 120 



permeability, 40 



plastids, 67, 68, 69 



spindle, 164 



vacuole, 79, 93, 94, 96, 97 

 Zonaria (brown alga), 280 

 Zoospores, 197, 198, 199 

 Zuelzer, 186 

 Zulueta, 310, 393 

 Zweibaum, 74 



Zygnema (green alga), 61, 65, 72, 279 

 Zygomycetes, 200 

 Zygonema, 256, 257, 258 

 Zygophase, 122 



Zygospore, 198, 228, 229, 279, 307 

 Zygote, 122, 249 

 Zygotic meiosis, 278 

 Zygotic number, 122 

 Zymogen, 88 



