640 



SUBJECT INDEX 



Phage resistance, clonal variance of mutations 



to, 408 

 Phenomenon, Liesegang, 376 

 Phenotypic 



characteristics in neoplastic cells in vivo, 423 

 correlation between members of families, 203 

 markers, 459 



and studies of somatic variation, 410 

 in neoplastic cells, 448 

 in tumors, 445 

 in vivo, 460 

 value of character, 194 

 variance, 216 



versus genotypic orientation in behavioral 

 patterns, 290 

 Phenotypes, behavioral, 292, 295 

 Photoreactivation, 152 



Physical methods for analyzing hemoglobins, 300 

 Physiologic characteristics, differences between 



inbred strains, 294 

 Physiologic genetics, 157 

 Piebald locus, 138, 147 

 Pigment 



development of with age, 341 

 spread, 333 

 Pigmentation 



inherent in tumor cells, 445 

 in mammals, nongenetic aspects of, 325 

 melanin biochemistry of, 336 

 Pigment cell(s) 

 origin of, 341 

 research, 323 

 studies in 

 cattle, 333 

 guinea pig, 333 

 rabbits, 333 

 Pituitary adenoma, 250 

 Pituitary tumors in hamsters, 267 

 Plasma-cell tumors, abnormal proteins in, 445 

 Plating, replica, 408 

 Pleiotropic 

 effect of 

 flexed tail, 257 

 genes causing anemia, 224 

 effects, 231 

 Pleiotropism, 226, 230 



ly-series and steel, 226 

 Pleiotropy 



effect of on hair direction on white forehead 



spot, 173 

 secondary, 161 

 Polydactylism and irradiation, 190 

 Polydactyly, 189, 190, 191, 247, 254 



in guinea pigs, 176, 293 

 Polydipsia in mice, genetic differences in, 232 

 Polygenic inheritance, 193 

 Polyoma virus, cytocidal interaction, 447 

 Population 



comparison of evolutionary processes in, 188 

 homallelic, 183 



with six modifiers, 184 



Population — continued 



of limited size, 46 

 Postimplantation losses, 152 

 Precipitation system, 368 

 Preimmunization of recipient hydrids, 425 

 Preimplantation losses, 151 

 Premutational damage, 142 

 Preparation of slides, 504 

 Preservation of red cells, 364 

 Pressure immigration, 185 

 Prevention of loss of lines of cells, 493 

 Probabilities of mating types, 4 



in backcross system, 18 



in cross-backcross-intercross system, 27, 29 



in cross-intercross system, 22 

 Probability of heterozygosity, 4 



in backcross system, 20 



in cross-backcross-intercross system, 30 



in cross-intercross system, 24 



with heterozygosis forced by intercrossing, 37, 

 38 

 Probability of incrosses 



for backcross system, 20 



for brother-sister inbreeding system, 15 



for cross-backcross-intercross system, 29 



for six mating systems, 39 



with heterozygosis forced by backcrossing, 

 33 

 Probability of mutation, 54 

 Probability of various mating types in cross- 

 intercross system, 24 

 Problems and potentialities in the study of genie 



action in the mouse, 217-229 

 Procurement 



husbandry, and equipment of mice, 538 



of blood, methods for, 351 



of mice, 554 

 Progression, tumor, 423, 434, 444 

 Prolactin, effect on cocks and phenotype, 278 

 Proportions 



of offspring in linkage crosses, 62 



recombinations, 75 

 Protection against induced genetic damage, 



148 

 Proteins 



abnormal, in plasma-cell tumors, 445 



alpha-2, 190 

 Protons, high-energy, 129 

 Pulmonary tumors, 249, 254, 258, 259, 264, 266 



estimating susceptibility genes for, 248 



estimation of number of genes, 254 



fetal transplants of, 259 



in mice, 251 



method of induction with carcinogens, 255 



production of 



with nitrogen mustard, 255 

 with sulphur mustard, 255 



urethan-induced, 200, 255 

 Purines, 154 



Qualitative genetic effects of radiation, 134 



