SUBJECT INDEX 



417 



Tissue culture, virus infection, 378-379 

 Ti.ssue inc()mpati[>ilitv, 372—374 

 TMV (tobacco mosaic virus), 24-27 



mutation with nitrous acid, 37-38 

 fraas-arrangement, 153-158 



in phage, 165-166 

 Transduction, 125-131 



abortive, 129-130 



and enzyme synthesis, 336-338 



by F factor, 144-146 



phase variation, 347-348 

 Transformation, 4 



HeTnophilus, 133-134 



pneumococcus, 12-22, 131-133 

 Transforming principle, 15 

 Translocation, 100-101 

 Transposition of controlling elements, 342- 



347 

 Trisomic, 93, 106 

 Trypanosoma cruzi, 246 

 Tryptophane svnthesis transduction, 158- 



' 162,278-279 

 Tryptophane synthetase, 276-280, 297-298 

 Tumor, 372-374, 376-377, 379 

 Twin spot, 359 

 Tyrosinase, 31, 274, 277 



Ultraviolet light, absorption by nucleic acids, 

 27 



action spectrum, 224 



and recombination in phages, 122 



bacterial recombination, 142 



diploidization, 363 



DNA and mutation, 227-229 



Euglena chloroplasts. 253 



induction of mutation, 223-225 



nuclear number in E. coli, 141 



origin of life, 393 



photoreactivation, 225-226 



somatic recombination, 370 



temperate phages, 124, 344 

 Unequal crossing over, 339 

 Uniparental inheritance, 238-241 

 Unit of function, 32, 39, 150-152, 158-163, 



167-173 

 Unit of mutation, 40-43, 150-152 

 Unit of transmission, 150-152 



Unsolved problems, i>ee Laboratory 

 Uracil, 5 

 Uridine, 5 



tritiated and RNA svnthesis, 314 

 Uridylic acid, 5-7 



V-tvpe position effect, 340-341 

 Variegated pericarp, 344 

 Variegation, see V-type position effect 

 Vegetative phage, 115, 123 

 Viruses, CO2 sensitivity, 379-380 



encephalitis, 25, 378 



Holmes rib grass virus, 24-27 



influenza, 378 



mammary tumor, 379 



polio, 25, 378 



provirus, 379 



Shope papilloma, 379 



somatic variation, 378-380 



TMV, 24-27 



see also Phage 



Waring Blendor, bacterial recombination, 

 136-137 



phage experiment, 23-24 



zvgotic induction, 146 

 Wheat (Triticum), 105 

 Wild tvpe, definition of, 35-36 



X chromosome, 92 



X-ray crystallography, 287-289 



X-rays, antigenic variation, 373 



chromosome breakage, 94-98 



induction of mutations, 103-104, 217-218, 

 219-225, 302 



virus-induced tumor, 379 



Y chromosome, 92, 95 

 y mutants, 334-338 



Yeast, {Saccharomyces cerevisiae), 83, 240- 

 241, 254-257 

 galactozymase, 321-322 



;: mutants, 334-338 

 Zygote, Chlamydomonas, 61 



Neurospora, 67-70 

 Zvgotic induction, 146 



