Subject Index 561 



polarity, 237 



predetermination, 237 



RNA, 28, 54, 277, 305 ff. 

 Operationalism, 175, 187 

 Organizer, 307, 325 ff., 402 ff. 

 Orthocladiinae, 65 



Paludina, centromere, 10, 12 

 Parallel induction, 257 

 Paramecin, 227 ff. 

 Paramecium 



antigenic properties, 202, 203 



Chlorellae, 228 



Dauermodifkation, 202, 203 



kappa particles, 227, 228, 240, 242 



killer effect, 226 ff., 240 



kinetics, 11, 16, 290 



macronucleus, 237, 238, 291, 301 



mating types, 237 



plasmagenes, 203, 227, 238, 240, 241 



plasmon, 240 

 Parthenogenesis, 10, 238, 474 ff. 

 Pattern, 398, 399 

 Peas, 126, 490 



Penetrance, 77, 87, 363, 378 ff. 

 Peromyscus, 479 

 Phenocopy, 255 ff., 322, 400 



chemical, 52, 53, 258, 260, 261, 

 263 ff. 



Drosophila, 257, 258, 262 ff., 377, 

 410 



fowl, 260 ff. 



and mutation, 259 ff. 



of sex characters, 428 

 Phenogenetics, 247 

 Pholiota, 215 

 Phosphatase, 29, 307 

 Physiological genetics, 247 ff., 407 

 Phytohormones, 407 

 Pisum. See Peas 



Plasmagenes, 41, 197, 203, 204, 218, 

 233, 240, 242, 309, 310, 322 ff., 

 329 ff., 420. See also Cytoplasm 

 Plasmids, 243 ff. 

 Plasmon. See Cytoplasm 

 Plastids 



albomaculatus, 231, 232 



chromosomal control, 230 



division, 229, 230 



genetic differences, 233 ff. 



maize, 232, 233, 236 



and mitochondria, 197, 229, 230, 237 



mutation, 231, 236 



nature, 229 



Oenothera, 232, 234, 235 



plastidome, 229, 234 



in pollen, 231, 235 



sorting out, 235 



as symbionts, 230 



variegation, 231 ff. 

 Pleiotropy, See Genie action 

 Pneumococcus, 47, 48, 49, 50, 53 

 Podoptera effect. See Drosophila 

 Podospora, 472 

 Polarity pf egg, 237 

 Polyenergid nucleus, 301 

 Polygenes, 75, 86, 87, 361 ff. 

 Polyspermy, 54, 208 

 Polyteny, 8, 54, 297, 298. See also 



Chromosomes 

 Population genetics, 479 

 Position effect, 119 ff. 



Bar, 120 ff., 168 



barley, 126 



baroid, 121, 122 



Blond, 126 



both breaks, 131, 137, 152, 160 



cubitus interruptus, 136 ff., 349 ff. 



of deficiencies, 134, 135, 156 ff., 191 



definition, 119, 136, 161 



of dominant rearrangements, 125, 

 130, 132, 185 



Drosophila, number, 131 



Dubinin effect, 136 ff., 165, 349 ff. 



of duplication, 121, 134, 170, 171 



general, 119, 157, 173 



heterochromatic breaks, 79, 82, 83, 



128, 129, 152, 153 

 heterochromatin, extra, 76 

 isoallelic, 137 



maize, 81, 126, 127, 132, 142, 147, 



149 ff., 156, 400 

 as modifiers, 105, 132 

 motthng, 76, 79, 82, 83, 93, 128, 



129, 149, 152, 153, 166, 256 

 multiple alleles, 131, 132, 169, 170, 



173 

 as mutation, 188, 270 

 Notch, 158 ff. 



overlapping, 159 ff., 189, 191 

 peas, 126 

 vs. point mutation, 127, 128, 131, 



141 ff., 157, 160, 173 

 position alleles, 169 ff., 355 

 reversal, 105, 130, 149 

 sections of, 158 ff., 169, 171, 173, 



181, 191, 399 

 Sturtevant's, 120 ff., 168, 180 



