248 



INDEX 



Purine riboside, antimutagenic ef- 

 fect of, 98 

 Pyridine, 201 

 Pyronine, 80 



Quinacrine, 169, 174 

 Quinolines, 199 



Recombination frequency, 139 

 Red cell, ghost, 23 

 Reduction division, in mice, 230 

 Reticulocytes, 36 

 Retinoblastoma, 14 

 Reversions, 152-55, 157 



adenine, 133 



histidine locus, E. coli, 134 



inositol, 133 



leucine, 133 



lysine locus, E. coli, 135 



tryptophan, 133 



tryptophan, in E. coli, 133 

 RNA, incorporation of P^- into, 33 



viral, deamination of cytosine, 59 



Saccharomyces pombe, 67, 130 



Salmonella, cysC region in, 118 



mutation rates in strains LT2 

 and LT7 of, 58 



Scopolamine, 79 



Sectorials, in maize, 51 



Serine, 91 



Sex ratio, age dependence of, 229 



Sodium nitrite, 172 



Somatic crossing over, in Drosoph- 

 ila, 56 



"Specific locus phenotypes," 128 



Spermatogonium, maturing of, 11 



Steroids, 174 



Streptomycin dependence, 117 



Suppressor mutations, 142 



Suppressors, intragenic, 160 



Syndrome, Klinefelter's, 232 



Klinefelter's maternal age de- 

 pendence of, 232 

 Turner's, 232 



Turner's, maternal age depend- 

 ence of, 232 



TEM (tri-ethylene melamine), 105, 



131 

 Temperature, 146 

 Teratogenesis, 170 

 Teratogens, 170 

 Tetramethyl uric acid, 188 

 Theobromine, 201 



metabolism of, 207 

 Theophylline, 201 

 Threonine, 58 

 Thymine, 95, 155 

 Thymonucleic acid, 81 

 Trace metals, 198 

 Transitions, 158 

 Translocations, 175 

 Transversions, 158 

 Triethylene imine, 80 

 Trimethyl uric acid, 188 

 Tryptophan, 54, 130 



reversions, in E. coli, 133 

 Tryptophan markers, Bacillus siib- 



tilis in, 55 

 Tryptophan reversions, 133 

 Turner's syndrome, 232 



maternal age dependence of, 232 

 Tyrosine, 172 



Ultraviolet light, 67, 131, 133-34, 149 

 induced mutations in E. coli, 132 



Umbo, 46 



Unstable genes, in Delphiniiitn 

 ajacis, 51 

 in Drosophila virilis, 51-52 



Valeric acid, 201 

 Variegation, in maize, 49 

 Virus, hepatitis, 174 

 Vitamins, 198 

 B, 198 



XO mice, induced by irradiation, 



230 

 X-rays, 131 



Yeast, forward mutations in, 67 

 methionine cistron in, 53 

 mutation rate in meiosis in, 17 

 mutation rate of site meti-i in, 56 



