590 



Subject Index 



Nucleoprotein, 305, 306 



Nulliplex, 448 

 Nullosomic, 437 



Octoploids, 433, 449, 450, 451, 463, 



467, 471, 475, 477 

 Oenothera, chromosome circles in, 

 536 



complexes in, 4^7, 428, 4^9, 534, 

 535, 536, 537, 541 



double flowered, 226 



evolution in, 533-537 



gold-center flower color, 320 



induced gene mutation in, 244 



lethals in, 427, 428, 534, 536 



mut. brevistylis, 226, 228 



mut. bullata, 80, 161, 163, 346 



mut. conjusa, 226 



mut. funifolia, 240 



mut. pannosa, 244 



mut. pollicata, 228 



mut. substella, 226 



mut. sulfurea, 320 



mut. supplena, 226, 227, 228 



mut. vetaurea, 161, 163, 320 



mutation rate in, 240 



number of chromosomes in, 534 



old-gold flower color, 161, 163, 320 



"outside-in" flower, 226, 22S 



reciprocal translocations in, 405, 

 534 



short-styled, 226 



sulfur flower color, 320 

 Oenothera Hookeri, 541 

 Oenothera Lamarckiana, flower of, 

 226, 320 



mutations in, 225 



nondisjunction in, 425, 4^8, 4^9 



pistil of, 228 



plastids in, 541 



rosette of, 244 



trisomies, 428, 429 

 Oenothera organensis, self-sterility 



alleles in, 277 

 Olfersia bisulcata, chromosome pair- 

 ing in, 214, 215 

 Oligogenic characters, 357, 358 

 Onion, see Allium 



Oocytes, 49, 65, 149, 152 



Ootids, 503, 504 



Oppositional factor hypothesis, 272 



Orange, 235 



Outbreeding, 367 



Outcross, 367, 512 



Overlapping phenotypes, 376 



Pi generation, 83 



Pachytene, 54, 55 ff., 56, 148, 152, 



418 

 Pairing of chromosomes, at meiosis, 

 52, 53, 64, 414 ff., 491 

 exactness of, 53, 397 

 failure of, 471, 524 

 heterozygous for a deletion, 55, 



193, 194, 393 

 heterozygous for an inversion, 55, 

 193, 194, 397 ff., 398, 399, 414 

 heterozygous for a reciprocal 

 translocation, 404, 405, 406, 

 407 

 in a haploid, 434, 435 

 in a monosomic, 415 

 in a trisomic, 417, 423 

 in an allotetraploid, 458, 4^0, 461 

 in an autotetraploid, 445, 44^, 44^ 

 in an autotriploid, 441, 442. 463 

 nondisjunction and, 425 

 without chiasmata, 213, 214. 215 

 Paradichlorbenzene. induction of 



polyploids by, 4^4 

 Paris, 220, 221, 224 

 Parthenogenesis, 67, 502 

 Patroclinous males, 425 

 Pattern of development, 302, 304, 



318 

 Pea, 6, 20 

 Peach, 235 

 Pedigree, 381 

 Pedigree culture method, 37, 196, 



540 

 Penetrance, 32-34 

 Pentaploid, 433, 452, 453 

 Pentstemon, 466, 467 

 Pepper, haploids in, 435. 436 

 Perfect flowers, 502 

 Peromyscus, 522, 523 



