INDEX 



nucleus, 17, 28, 145 sqq., 182 

 nullisomic, 105 

 nutrition, 160 sqq. 



oats, 16, 64, 158 



fatuoid, 338, 339 

 Oenothera, 30, 106, 130, 170, 246, 

 309, 316, 332, 341 



complexes, 261 sqq. 



embryo sac, 201 

 orientation, 31, 123 

 Orthoptera, 52, 290 

 osmosis (social), 358 

 outbreeding, 282 sqq., 297 



bias, 247 



devices, 242 

 restriction of, 305 sqq. 



species, 320 

 Oxalis, 251 



pachytene, 29, 122, 128 



Paconia, 321, 322 



Painter, 27, 35 



pairing segment, 52, 133, 346 



pangenesis, 274 



Paramecium, 175 sqq., 191, 203 



parameters, 56 



Paratettix, 335, 336 



Paris, 290 



parthenogensis, 98 



cyclical, 264 

 Pasteur, 210 

 Patau, 131 

 paternity, 351 

 pattern, 157 

 pea, V. Lathyrus, Pistim 

 Pearson, 61, 62 

 Pedicuhpsis, 241, 260, 297 

 Pelargonium, iii 

 penetrance, 160 

 Penicillium, 343 

 pepsin, 145 

 Peto, 234 



Petunia, 174, 253, 255, 305, 332 

 Pharbitis, 164 



Phaseolus, 62, 72, 184, 2x8, 239 

 phenocopy, 184 

 phenotypc, 15, 156, 204 



optimum, 283 

 philology, 360 

 phonetics, 360 

 Pickford, 49 

 pigmentation, 155 sqq., 163, 193, 2i( 

 pigs, 237, 283 

 pin and thrum, 249 



piracy, 222 



Pisum, 36, 55, 182, 216, 240 

 plasmagene, 173 sqq., 203, 216, 344 

 plastid, 149, 169 

 plastogcne, 169 

 plciotropy, 115 

 290, I Pneumococcus, 210 

 Poa, 268, 269 

 point mutation, no 

 polar body, 97 

 pollen, 96, 105, 123 sqq., 139 



differentiation, 195 sqq. 

 gene action in, 191 



mechanism, 241 

 polygamy, 358 



polygenes, 66, 78, 150, 329, 330 

 polygenic system, 66 sqq., 279 

 polymeric genes, 68 

 polymerization, 145 

 polymitosis, 198, 212 

 polymorphism, 335 sqq. 

 polypeptide, 145 

 polyploidy, 95, 121, 134, 321 



in blood, 194 

 secondary, 98, 324 

 polysomy, 95 

 polytene, 26, 47, 106, 131 



chemistry, 145 

 Pomoideae, 324 

 Pontecorvo, 343 

 populations, 153, 351, 364 



randomly breeding, 89, 90 

 position effect, 106, 118, 152, 155, 330 

 potato. III, 218 

 poultry, V. fowl 

 precursor, 162 sqq., 177 



cells, 194 

 Preer, 177, 203 

 Prell, 245 



presence and absence, 106 

 primrose, v. Primula 



Primula, 114, 135, 169, 231, 24gsqq., 310 

 prophase, 23 

 protandry, 242, 258 

 protein, 145 sqq., 207 sqq., 219, 268 

 protogyny, 242 

 protozoa, 29 

 provirus, 214 

 Prunus, 243, 247 

 pure line, 62 

 Pyrethrum, 200 

 Pyrus V. apple 



quadrivalent, 126, 137 

 quantitative effects, 151 



444 



