SUBJECT INDEX 



641 



Quantitative 



character, 193 



number of genes, 214 



degree of genetic variation, 216 



determinations of the erythron, 560 



inheritance, 193 



variability, 191 

 Quantitative inheritance, 193-216 

 Quasicontinuous variation, 241-247 



Rabbits 



gamma-globulin groups in, 379 



pigment cells, 333 



stocks of, of genetic interest, 120 



strains of, in development, 118 



symbols for designating strains of, 120 



uterine tumors in, 254 

 Racks for cages, 552 

 Radioactive 



antibodies, 463 



tyrosine, 342 

 Radiation 



chimeras, 417 



chronic exposure, 130 



congenital deformities produced by, 153 



cosmic, 129 



dominant lethals, 135 



dominant visible mutations, 140 



dose-rate effect, 142 



dosimetry, 128 



effect, cytogenetic analysis of, 143 



effect of actinomycin D on, 152 



effect of dose rate of, on mutation rate, 141 



effect of hypoxia on, 148 



effect' of, on embryonic stages, 151 



exposure variables, 131 



exposure, techniques of, 131 



fractionated exposure to, 130, 142 



gamma, 128 



genetic analysis in mammals, 132 



genetics, 125 



hereditary partial sterility, 134 



induced sterility, 133 



internal emitters, 129 



international cooperation in studies, 151 



mutations, 136 

 dominant, 136 

 lethal, 136, 138 

 recessive, 136, 138 

 visible, 136 



neutrons, 128 



nonuniformity of absorbed dose, 128 



paired-dose method, 131 



parameters, 128 



premutational damage, 142 



pressures to reduce hazard of, 152 



protection against induced genetic damage, 

 148 



qualitative, genetic effects of, 134 



quantitative, genetic effects of, 143 



recessive visible mutation, 141 



Radiation — continued 



reduction of litter size following, 139 



reproductive performance following, 133 



response of anemic mice, 225 



selection of species and systems of mating, 

 149 



sex ratio following, 144 



single exposure to, 130 



space, 129 



sources, 128 



temporal factors in, 130 



tool for genetic research, 150 



viability following, 144 



X, 128 

 Radius, swept, 76 

 Random 



assortment, 48 



drift, 187, 191, 192 



mating, 4, 6 



mutation, 192 



selection, chance in, 54 

 Rates 



of hormonal secretion, 271 

 correlated changes in, 273 



of ovulation, 271 



and hormonal secretion, 273 

 and reproductive efficiency in mice, 276 

 Ratio of heterozygosis, 48 

 Rats 



established strains of, 105 



lists of symbols for designating substrains, 1 10 



stocks of genetic interest, 110 

 RBE, 128, 141, 142, 145 



nonlinear relation between, and energy, 129 



values, 129 

 Recessive mutations, 136 



lethal, from radiation, 138 



visible, 141 

 Recombinant 



double, 75 



gamete, 58 

 Recombination 



between ru andjV, estimation of, 72 



differences between sexes, 78, 79 



estimate of, 78 



estimation of, between Ix and W v , 71 



frequencies, estimation of, 56 



percentages, 77 



probability of, 61 



proportion, 75 



sexual, 408, 459 

 Records, methods of keeping, 522 

 Recovery from mutation, 138 

 Recurrence equation for relative heterozygosis, 



49 

 Red blood cells 



antigens coupled to, 367 



immunogenetics of, 350 



preservation of, 364 



test systems for immunogenetic studies, 357 

 Reflection-meter readings, 162 



