Subject Index 555 



r>e, 15, 16 

 Sciara, 485 

 Tradescantia, 117 

 waterbugs, 8 

 Ciliates. See Infusoria 

 CiTsium, 200 

 Coccids, 11, 465 

 Coccinellids, 398 

 Collaboration of mutants, SSB fiF. 

 Competence, 313 flF., 324, 395, 403 

 Competition for substrate, 319 ff., 323, 



350 ff., 385 

 Conversion theor>-, 24 

 Cotton, 400 ff. 



Covering effect. See Duplication 

 CTotaegomespilus, 215 

 Crepis, 78, 4&3 ff. 

 Crossing over 



inversion effect, 162 

 somatic, 289, 311 

 theor>-, 4, 24 

 tmequal, 24 

 X and Y, 441, 473 

 C>i:oplasm 



conditioning, 195, 197, 200, 2-37, 311, 



323 

 control of chromosomes, 218, 238, 



255, 290, 291 

 diversification, genetic, 323 

 Epilobium, 209 ff., 213 

 genes, 196, 218, 219, 224, 225, 238, 



242, 323 

 genie properties, 7, 331 

 Habrobracon, 206 

 Lymantria, 198, 200, 205. 208, 209, 



214 

 Mendelian segregation in, 205 ff., 239 

 mosses, 211 

 mutation, 222, 223 

 paternal, 214 

 plasmon, 196, 204, 213, 215, 217, 



218, 238, 239 

 pollen sterilit>-, 209, 211, 215, 236 

 predetermination, 195, 198. 200, 214, 



237, 433 

 in sex determination, 93, 199, 200, 



215, 241, 432 ff., 456 

 specificity, 194, 195, 290, 314. 316, 



317 

 of sperm, 208, 214 

 stratification, 314 ff., 322 ff., 420, 



421 

 as substrate, 7, 194, 215, 233, 311, 

 314 ff., 385 



Dahlia, 252 ff., 389 ff. 



Datura, 384 



Dauermodifikation, 53, 195, 201 ff. 



Deficiency 



dosage, 138 



exaggeration, 139, 140, 343 ff. 



homorvgous, 1>5, 157, 160 



lethal, 13-3, 160, 400 ff. 



maize, 1>5, 141, 142 



mutants as deficiencies, 1-33. 13-5. 141, 

 142, 156, 160, 186, 187 



position effect 1>3, 13-5. 140 ff.. 156, 

 157, 160, 161, 186 ff., .3.51 ff. 



v^ith salivaries normal, 142 



terminal, 13-5 



test for loci, 160 

 Determination, 287 ff., 323 ff. 



hierarchy, .317, 319 



intranuclear. 289 



labile, 411 ff., 416, 418 



mutants for, 311 



sti-eam, 411, 418 

 Diapause, 26-5 ff. 

 Dimorphism, seasonal, 265 ff. 

 Dinophilus 



oogenesis, 54, 465 



sex, 46.5, 466 

 Dioecism derived from monoecism. See 



Monoecism 

 Diptera (general. 65, 66, 166, 402 

 DXA 



in bacteriophage, 244 



constancv, 22,~'31 ff.. 44. 46. 56, 109, 

 300, 302, 307 



c>toplasmic, 25, 54, 222, 228, 3.31 



dupHcation, 7, 39 ff., 46, 56 



as hereditary material. 21. 29 ff., 

 34 ff., 50 ff., 163, 164, 298 



molecule, 13, 35 ff., -45, 51. 56, 164 



in nutrient and egg cells, 20, 54, 56, 

 69, 228, 275 



plastids, 230 



pol>"Si>emi>', 54 



quantitative difference in mutants, 

 44, 45 



quantity", 2-3, -31, 34, 35, 37, 56, 300, 

 307 ' 



in Rickettsia, 222 



structure as code of function, 39, 42, 

 43, 164 



as template, 36 ff., 43. 56, 164 



time of s>"nthesis, 33 



transfer to chromosomes. 50. 51, 54. 

 69 



