438 



AN INTRODUCTION TO MODERN GENETICS 



gene(s)j sex-linked 79, 331 



size 377 



sterility 214 



sub-units 370, 373, 400 



taxonomically important 271 



variable 187 



viability 162, 301, 384 



in wild populations 286, 295 

 genetic control, chromosome size 378 



mutation rate 372, 381 

 genetics, definition 24 

 genomeres 373 

 genotype 29, 155 

 genotj^ic milieu 163, 297 

 germ track 209 

 grading up 311? 358 

 graft hybrids 87 

 Graptohtes 247 

 growth, heterogonic 243, 296 

 and heterosis 317 

 relative 201 

 Gryphaea 242 

 guinea-pig 203, 271 

 gynandromorphs 86, 217, 228 



Habrobracon 62, 86, 229 

 haploid 35, 72 

 heiresses 353 

 hemizygous 62 

 hereditary traits 328 

 heterogametic 75 

 heteropycnosis 76, 78 

 heterosis 317 

 homoosis 205 

 horses 319 

 hybrids, fertility 72, 283 



species 258, 265 



vigour 317 



wide 321 

 Hymenoptera 62, 229 

 hypoploid 86 



immunology 271 



inbreeding and evolution 295 



index of 312 



in man 330, 336, 356 



and pure lines 314 



and vigour 3^7^ 3i9> 33^ 

 individuation 140, 149 

 inert regions 40, 78, 98, 373, 400 



spiralization 396, 379 

 insect development 143 

 inteUigence 335, 337, 352 



interference, chiasma 118, 125 



chromatid 128 



crossing-over 89, 126, 129 

 interphase 39 

 intersexes 213, 217, 219 

 inversions 93, 95, 129, 265 



Lebistes 77, 80, 223 

 Lepidoptera, melanics 193, 304 



triploids 219 

 lethals 163, 384 



balanced 93, no 



gametic no 



wild 295 

 Limnea 58, 143, 193, 280 

 linear order 49, 398 

 linkage 33, 46, 48 

 local races 266 



in evolution 295 



in man 340 

 locus 31 

 lupin 311 

 Lymantria 173, 181, 275 



races 271 



sex 216, 228 



maize 84, 119, 250 



Euchlaena hybrid 123 



maps 124 



selection 310, 317 



sex 223 



starchy 57 



vitamins 166 



waxy 55, 79 

 male sterihty 275 

 Malthusian parameter 288 

 mammals, development 152 



sex 228 

 man, albinism 325, 330 



alkaptanuria 175 



amaurotic family idiocy 335 



blood groups 175, 325, 326, 342 



Brachydactyly 201, 328 



class differences 347 



colour bhndness 331 



diabetes 326, 328 



differential fertility 352, 357 



Glaucoma 329 



grading up 358 



haemophilia 325, 332, 355, 380 



Huntington's chorea 335 



inbreeding 330, 336, 356 



induced mutation 382 



