Subjects 



553 



Rhyncosciara, 492. 493 

 RNase (ribonuclease), 263, 364, 

 425, 431, 435 

 denatured and renatured, 435 

 RNA (ribonucleic acid), 262-263 

 and antibodies, 504 

 coding for amino acids, 436- 



445 

 and differentiation, 504 

 double-stranded, 366 

 as genetic material, 263, 363- 



366 

 and genetic recombination, 363 

 and learning, 504 

 messenger (mRNA), 438, 481, 



489, 502, 503, 504, 505 

 methylation of. 429 

 polymerase, DNA-dependent, 

 426 

 RNA dependent, 366, 426 

 and polypeptide synthesis, 423- 



431 

 in puffs, 492 

 replicase, 366 

 ribosomal, 426-427, 496 

 secondary structure, 428, 462 

 soluble (sRNA) (transfer or 

 adapter), 427-428, 428, 429, 

 430, 444 

 synthesis regulation, 453-454 

 synthetase, 366 

 as template for DNA, 289 

 terminology, 262 

 ribonucleoprotein, 262 

 ribonucleotides in DNA, 289 

 ribose. D-, 257, 262 



2'-deoxy-D-, 257 

 riboside, 263 



ribosomes, 423-425, 424, 429- 

 431, 496 

 poly-, 430, 431 

 ribotide, 262 



oligo-, 442-444 

 rickettsia, 376 

 roentgen (r) unit, 180 

 rotational substitution, 398 

 roundworm (see Ascaris) 

 rye, 246 



salmon DNA bases, 266 

 Salmonella, 297, 330-334, 333, 

 334, 358, 360, 388, 460-461 

 schizophrenia, 79 

 Sciara (fungus gnat), 492, 494 

 scission of DNA, 302 

 sea urchin, 152, 266, 500 

 seasonal barriers, 245 

 sedimentation unit (s), 423 

 seedlings, corn, 371-372, 372 

 segregants, bacterial, 313 

 segregation, 156 

 of alleles, 31-39 



alternate, 231-233, 232 



independent. 42-49 



distortion, 386-388, 470 

 selection, 65, 202-205, 513 



coefficient, 204 

 selective markers, 313-314 

 selfers, 388 



self-sterility, 60-62, 61 

 semilethals, 216, 217 

 Serratia, 323 

 sex, 5 



in bacteria, 312. 317-327 



in Chlamydomonas, 376 



chromatin, 484-486 



chromosomes, 90-98 



determination, 102-112 



factor, 357-358 



index, 105 



-linked genes, 90-98 



mosaics, 106, 107 



ratio, human, 109-110 



types, abnormal, 103, 104, 105 

 sexduction, 358 

 sexual barriers, 245 

 sexuality, importance of, 112 



para-, 504 

 sheath, 339 

 Shigella, 358 

 sib matings, 207 

 sibling, 75 



species, 245 

 sickle-cell anemia, 71, 72, 209, 



413-416, 413 

 sigma in Drosophila, 370, 376 

 sigma (population standard devi- 

 ation), 534 

 silks, 26 

 silkworm, 10 

 singlet or doublet Paramecium, 



505 

 sister strands, 122 

 skin color, 51, 56 

 snail, 111, 494, 503, 508 

 snake venom diesterase, 282, 366 

 snapdragon (Antirrhinum), 54, 



69 

 Solanum. 246-247 

 Solenobia. 152 

 soluble RNA (sRNA) (see 



RNA) 

 somatic cell mating, 503-504 

 somatic line, 15, 221-222 

 somites, 83 



sonication, 273, 280. 299 

 Sordaria ftmicola, 148 

 Spartina, 247-248 

 speciation, 203, 241-249 

 sperm, 5, 24, 180, 184 



human, 109 



nuclei, 26 

 spermadine, 339 

 spermatheca, 24 



spermatid and spermatocyte. 24 

 spermatogenesis, 24 

 spermatogonia, 24 

 sperm iogenesis, 109 

 spindle, 6. 9 



achromatic, 155 



divergent, 383 



orientation, 503 

 spirochaete, 1 10, 370, 376 

 sporophyte, 25 

 spreading effect, 473 

 standard deviation, 521-523 

 standard error, 536 

 Staphylococcus, 336 

 statistic, 520 

 sterility, 245 



mutants, 216, 217 

 stillbirths, 208 

 strand recombination in vitro, 



301-303 

 strand synthesis, direction of, 286 

 streaking method, 294 

 streptomycin. 299. 306. 307, 309, 



376, 440 

 strontium-90, 224-225 

 style, 26 



subvitals, 216, 217 

 suicide experiment, 327, 395 

 sulfanilamide, 393 

 superfemale and -male, 103-105, 



103 

 superposition, 5 1 

 superrepressor, 458 

 surface-volume relations, 153 

 symbols, 116 

 sympatric, 243 

 synapsis, 16, 153, 298, 481 



oblique, 474, 475 

 synergid nuclei, 25, 26 



t test, 528, 536 



tasters and nontasters, 214 



tarweeds, 246 



T-(tau) test, 536 



tautomerism, 394, 395 



taxonomy, and DNA hybrids. 



302, 305 

 telomere. 164 

 telophase. 8. 9, 17, 18. 21 

 temperature and mutation, 192, 



402 

 tempo preference, 78, 79 

 teosinte, 251 

 test cross, 46 

 testosterone, 505 

 tetrad, 16 



tetrad analysis, 147-148 

 tetramers, 412, 504 

 tetraploid. 105. 151. 158, 484 

 tetrasomic. 157 

 thalassemia, 39 

 theophylline as mutagen, 391 



