SUBJECT INDEX 



639 



Mutants — continued 



of Peromyscus maniculatus, 121 

 Myelomeningocele, 238 

 Myoepitheliomas, 250 



Nagasaki, 144 



Natural fitness, 214 



Natural selection, 185 



Net selection coefficients, 187 



Neoplasia (see also Cancer, Carcinoma, Tumors) 



estimation of number of susceptibility genes, 

 254 



genetics of, 247 



hepatomas, 265 



host-parasite relationship, 262 



in species other than mouse, 253 



leukemia, 268 



linkage between genie loci, 256 



localization of genie action in organs and 

 tissues, 258 



multiple-factor inheritance, 247 



nongenetic factors, 247 



pancreatic, in hamsters, 267 



paths of genie action in, 258 



pituitary, in hamsters, 267 



pulmonary, 264, 266 

 Neoplastic cells 



in vivo, 422 



phenotypic characteristics of, 423 



phenotypic markers in, 448 

 Neoplasms, inbred strains for studies on, 249 

 Neural crest, 341 

 Neurospora, 161, 218, 231 

 Neutrons, 128 



fast, '128 



somatic lethal effects, 142 



thermal, 128 

 Nitrogen, liquid for refrigeration of cells in vitro, 



510 

 Nitrogen mustard, production of pulmonary 



tumors with, 255 

 No effect of some genie combinations, 180 

 Nomenclature 



for inbred strains, 84 



of mice, international rules for, 517 



standardized for inbred strains, 84 

 Nonadditive variance, 198 

 Nondisjunction, 416, 460 



Nongenetic aspects of mammalian pigmenta- 

 tion, 325 

 Nonrandom linkage associations, 194 

 Nonuniformity of absorbed dose, 128 

 Nuclear transfers, 464 

 Nuclear transplantation, 409 

 Number of genes, 214 



Nutritional requirements of cells in vitro, 451 

 N-terminal analysis, 315, 321 



Observed characters, relationship between 

 genome, external environment, and, 160 

 Ocular carcinoma in cattle, 248 



Official characters, 248 

 Offspring 



from recombinant and nonrecombinant 

 gametes in three kinds of mating, 57 



parent regression, 201 

 Oligodactyly, 60 

 Order of linked genes, 56 

 Organ chimeras, 444 

 Origin of pigment cells, 341 

 Otocephaly, 247 



Ova, fertilized, technique for transfer of, 563 

 Ovarian transplants, 373 

 Ovaries 



transplantation of, 252 



tumors of, 250, 261 

 Ovulation, rate of, 271 



and hormonal secretion, 273 



and reproductive efficiency, 276 



in mice, 276 

 Oxygen consumption of skin in different geno- 

 types, 337 

 Oxyhemoglobins of mice 



analyzed by starch-gel electrophoresis, 306 



analyzed by ultracentrifugation, 310 



Paired-dose method of radiation, 131 



Panmictic indices, 45 



Paper chromatography, 340 



Paper electrophoresis, 303 



Papilloma of skin, 249 



Parabiosis, 373, 414 



Paraffin-oil adjuvants, 377 



Paralysis, tolerance, and enhancement, 373 



Paramecium, kappa particles in, 262 



Parameters, radiation, 128 



Parasite-host relationship, 381 



in cancer, 262, 264 



symbiotic relationships to host, 403 

 Parental gamete, 58 

 Parent-offspring inbreeding, 4 

 Partial sterility, 135 

 Path analysis, 42 

 Path-coefficient analysis, 54 



Pathogenic mechanisms underlying malforma- 

 tions, 238 

 Pathogens 



effect of numbers on survival, 389 



introduction in food for mice, 545 



relationship between survival and selection for 

 resistance to, 391 

 Pattern of alteration of chromosomal numbers, 



507 

 Peptide analysis, 317 

 Percentages, recombination, 77 

 Permanent preparations of chromosomes, 



techniques for, 484 

 Peromyscus maniculatus, 185 



mutant stocks of, 121 



stocks of possible genetic interest, 122 

 Phaeomelanin, 162, 324, 340 



in guinea pigs, 163, 164 



