644 



SUBJECT INDEX 



Susceptibility — continued 



relationship of genie differences to morbidity, 

 404 



to disease, historical sketch, 400 

 Suspended cells, use of in immunogenetics, 365 

 Swept radius, 76 



Swine 



amount of gonadotrophic hormone secreted, 



281 

 hormonal content of adenohypophyses in 

 different strains of, 274 

 Symbiotic relationship of parasite to host, 403 



Symbols 



for designating substrains of guinea pigs, 1 13 

 for designating substrains of hamsters, 1 17 

 for designating substrains of mice, 101 

 for designating substrains of rabbits, 120 

 for designating substrains of rats, 110 



Syndrome 



Klinefelter's, 415 

 Turners, 416 

 Synergism between teratogens, 241 

 Syrian hamsters, 471, 473 

 established strains of, 114 

 stocks of, of genetic interest, 116 

 strains of, in development, 115 

 Systems based on relationship, 4 



histocompatibility, 423, 468 

 Systems of breeding, 3, 4 

 agglutination, 358 



based on controlling locus of interest, 5 

 brother-sister inbreeding, 5, 12 

 backcross, 18, 53, 57 

 with heterozygosis forced by backcrossing, 



5, 32, 33 

 with heterozygosis forced by intercrossing, 



5, 36 

 choice of, 39 

 combination of locus control and relationship, 



5 

 cross-backcross-intercross, 3, 27, 28, 53 

 cross-intercross, 22, 23 

 double backcross, 57 



generation matrix in the backcross system, 20 

 generations required to obtain a given per- 

 centage of incrosses, 2 1 

 intercross, 57 



matrices for brother-sister, 16 

 mixed cross, 57 

 probability of heterozygosity in the backcross 



system, 20 

 probability of incrosses for the backcross 



system, 20 

 random mating, 5, 6 

 selection of species and for radiation genetic 



studies, 149 

 single backcross, 57 

 summary, 41 

 theory of, 3 



Systems of breeding — continued 



used in cancer research, 249 



used in mammalian genetics, 3 

 Systems of mating used in mammalian genetics, 

 3-41 



Tables 



and carts for care of mice, 553 



Finney's, 67, 68, 69, 70 

 Tactics in pigment-cell research, 323-336 

 Tag holders, 553 

 Target-specific hormones, 280 

 Techniques 



cloning, 461 



cytotoxic, 375 



for preparing chromosomes, 472 



for the study of anemias in mice, 558 



for the transfer of fertilized ova, 563 



of radiation exposure, 131 

 Techniques for the study of anemias in mice, 



558-562 

 Techniques for the transfer of fertilized ova, 



563-564 

 Temperate bacteriophages, 459 

 Temperature 



effect of, on coat color in guinea pigs, 169 



effect of, on genie action, 231 



effective period, 191 



of animal rooms for mice, 541 

 Temporal factors in radiation, 130 

 Teratogenesis, pathogenetic mechanisms under- 

 lying malformations, 238 

 Teratogens, 188 



biochemical effects on development, 240 



effect of combinations of, 241 



interaction with genes, 244 



synergism between, 241 

 Teratomas, testicular, 250 

 Teratology 



agents used, 235 



clustering, 243 



developmental stages at which agents used, 

 236 



dosage of agents used, 237 



experimental, 233 



influence of maternal weight on, 242 



interaction of genes and teratogens, 244 



mammalian, 233 



proper use of controls, 234 



relationship between mother and fetus, 241 



summary of methodology, 245 



types of animals used for study, 233 



use of inbred lines, 234 

 Tester stock, 137 



Testing segregations and detecting linkage, 58 

 Test 



complement-fixation, 376 



fluctuation, 438, 439, 442, 452, 461 

 Tests, cytotoxic, 378 



in non-//-2 systems, 378 



