632 



SUBJECT INDEX 



Drug resistance — continued 



markers, 452, 457 



of tumor cells, 423 

 Drug resistant variance of cells in culture, 

 462 



Ears, code for marking, 523 

 E. coli, sex factor of, 459 

 Effect of 



genes on specific tissues, 218 



temperature on genie action, 231 

 Electrons, low energy, 129 

 Electrophoresis 



agar-gel, 307 



immune, 307 



moving-boundary, 301, 302 



paper, 303 



starch-block, 304 



starch-gel, 305, 370 



zone, 302 

 Electrophoretic analysis of hemoglobins, 300 

 Elementary genie action, 160 

 Elimination rates of labeled cells, 363 

 Embryo, biochemical properties at various stages 



of development, 238 

 Embryonic 



development affected by genes, 222 



stages, effect of radiation on, 151 

 Embryos, avian, use of for heterologous grafts, 



327 

 End-group analyses, 315 

 Endocrine defects, 22 1 

 Endocrinology, basic concepts of, 269 

 Endomitosis, 414 

 Energy 



electron, 129 



spectrum, 129 

 Enhancement, tolerance, and paralysis, 373 



immunologic, 431 

 Environment, influence of on behavior, 287 

 Environmental 



effects on coat color, 169 



variance, 195 

 Enzymatic inhibition, 367 

 Epigenetic, mechanisms in transplanted tumors, 



432 

 Episomal transduction, 459 

 Episomes, 459 

 Epistasis, 199 

 Equipment 



and facilities of mouse colony, 546 



husbandry, and procurement of mice, 538 

 Erythrocytic mosaicism, 414 

 Erythron 



in mutants, 223 



quantitative determinations of, 560 

 Erythropoietic stimuli, response of anemic mice 



to, 226 

 Escherichia coli, 161 



Established strains of animals (see Strains) 

 Estimate of hormonal secretion, indirect, 271 



Estimation 



of heterogeneity, 70 

 of number of genes, 216 

 of recombination, 72, 78 

 frequencies, 56 

 Estrogen, response to, by different inbred strains, 



276 

 Eumelanin, 162, 324 



in guinea pigs, 163, 164, 165 

 Evolution 



genie interaction in, 183 



in homogenous and subdivided populations, 

 comparison of, 188 

 Exposure variables of radiation, 131 

 Extrachromosomal factor in resistance to leuke- 

 mia, 253 

 Eye of mammal, transplantation to, 330 



Fi hybrids, 253 



change in histocompatibility requirements 

 after passage through, 426 



use of in localizing genie action, 258 

 F t tumors 



behavior of, 427 



isoantigenic variance from, 434 

 Facilities and equipment of mouse colony, 546 

 Factor interactions in coat color of guinea pig, 



161 

 Fast neutrons, 128 



Fat pad, mammary gland, transplantation of, 26 1 

 Feeding of mice, 539 



Fertility and gonadotrophic hormone, 270 

 Fertilized ova, technique for transfer of, 563 

 Fetal lung, transplants of, 259 

 Fetal-maternal isoimmunization, 465 

 Fibonacci series, 45 



Filter assemblies for sterilization of media, 506 

 Filtration of air in animal rooms for mice, 542 

 "Fingerprinting," 318, 321 

 Fitness, 185 



natural, 214 

 Fixation, complement, 370 

 Flexed tail, pleiotropic effect of, 257 

 Fluctuation test, 438, 439, 442, 452, 461 

 Fluorescent antibodies, 379, 463 

 5-fluorouracil, 190 

 Food 



dispenser, 552 



for mice, introduction of pathogens in, 545 



hopper for cages for mice, 550 

 Forced heterozygosis, 257 

 Forehead spot, 175 

 Foster nursing, 251 



Fractionated exposure to radiation, 130, 142 

 Freezing 



of cells in culture, 507 



preservation of cells, 47 1 

 Frequencies 



genie, 42 



genotypes, 6, 7, 43 



of mating types, 4, 1 1 



