SUBJECT INDEX 



439 



man, Mongolian idiocy 336 



natural selection 351, 353 



non-disjunction 82 



skin colour 382 



taste 325 

 Maps, crossing-over 89, 97 



crowding of genes 91, 97, 100, 

 126, 131 



cytological 97, 99 



distance 91 



mutation frequency 92, 98, 99, 100 



salivary 99 

 maternal effect 58, 280 

 Matthiola 55 



maturation, differential 230 

 Medlars 88 

 meiosis 35, 113, 361 

 Melandrium 55 

 merogony 63 



bastard 147, 150 

 mice 86, 160, 161, 201, 202, 270 

 mimicry 299 

 mitosis 34, 113, 361 

 mosaics 84, 372, 285, 400 

 Mosses, life cycle 53 



hybrids 67, 170, 276 



regeneration 67, 213 



sex 213 



species 258 



tetrads 54, 102 

 mountain-ash 321 

 Musca 144 

 mutation, constant 391 



de Vriesian no 



and evolution 290, 296 



genetic effects on 372, 381 



induced 304, 382 



process 389 



rate 372 



somatic 59,320,372,381,385,400 



spontaneous 380 



temperature coefficient 381, 383, 

 389 



natural selection, evidence of 299 



in man 351, 353 



rate of 290 



theory of 284, 288 seq. 

 nature and nurture 188, 333, 337, 



344, 347 

 nectarine 320 

 negros 344 

 Neurospora 102, 129 



Nicotiana digluta 256 



hybrids 258 



tabacum 72, 320 

 non-disjunction 80 seq. 

 nucleic acid 378, 392, 396, 400 

 nucleo-cytoplasmic ratio 66, 68 

 nucleolus 39 

 nucleus, effect on cytoplasm loi, 143, 



275 

 restitution 60, 63, 64 



Oenothera 109, 268 



Oporabia 300 



oranges 59, 321 



organ-forming substances 139, 141 



organizer 138, 140, 148 



pairing, blocks 69 



failure of 63, 267 



in hybrids 258, 266 



mechanism 363 



in polyploids 69 



in salivaries 99 



secondary 73 



snarl 130, 367 



somatic 74 



in structural hybrids 



in 2's 68, 107 

 palaeontology 241 seq. 

 palingenesis 246, 296 

 parasynapsis 113 

 parthenogenesis 59 



artificial 62 



male 63 



and sex 229 

 patterns, developmental 

 peas 30, 32, 109, 268 

 penetrance 190, 326, 328 

 Peromyscus 273 

 persistent modifications 278 

 phaenogenetics 137 

 phasic development of plants 

 phenocopies 191, 196, 303 

 phenotype 29, 155 

 Pieris 304 

 pigments, flower 175 



Drosophila 176, 182 



feather 198 



Lepidoptera 193 



rodents 179, 200 

 Platycnemis 145 

 pleiotropy 162 

 pollen 55, 179 



154, 192 



324 



