464 



INDEX 



planet, 441^42 

 plants, flowering, 222, 259 

 plaque, 386, 387 

 plastid, 413^15, 428, 440 

 plate, hexagonal, 382, 383 



pleiotropism (manifold eff"ects), 68-70, 163, 208, 210, 

 234, 244, 265, 271, 275, 277, 279, 287, 421, 446 

 ploidy, 139, 181,245, 246 



eu- vs. aneu-, 143 

 Pneumococcus (Diplococcus), 340-342, 345, 346 

 point mutation, 197-202 

 polar bodies, 88 

 polarity, 197, 300, 303 

 poliomyelitis, 77, 304, 403 

 pollen, 63, 114, 121, 152 

 polyamine, 382 

 Polydactyly, 71, 74 



polydeoxyribonucleotide, 300, 302, 303, 308, 311 

 polygenes, 56, 108 

 polymer, 300, 303, 371, 433^140 

 polymorphism, balanced, 242 

 polynucleotide phosphorylase, 433^36 

 polypeptide, 286-290, 289, 293, 309, 382, 395 

 polyploidy, 139-141, 147, 213, 302, 306, 449, 450 

 polyribonucleotide (polyribotide), 303, 433^36 

 polysaccharide, 340, 342 

 polysomy, 143, 145, 249 

 polyspermy, 97, 317 

 polyteny, 141, 213, 303, 316, 317, 449 

 population, 32, 210, 254, 275, 330 



genetics, 224-226, 229-236, 239-249 



natural, 170, 173, 176,253,254 

 position eff"ect, 185-195, 215, 235, 371, 449 



and mutation, 185, 222, 245 

 postbitlwrax {pbx), 193, 194 

 potassium, 345 



Potentilla (cinquefoil), 254-255 

 precursors, 273, 278, 282 

 probability, 11, 130, 132 

 proboscis, 95 

 proline, 69, 285, 353, 369 

 prophase, 16, 77, 18, 24, 25, 26, 28, 29 

 protamine, 293-294 

 protein, 262, 277, 284, 293, 340, 382, 406, 421-425, 424 



synthesis, 427-436, 447 

 Proteus, 380 

 proton, 176 



protoplasm, 150, 181, 274, 281, 293 

 protoplast, 384 



prototrophy, 332, 349-354, 351, 356, 440 

 prune eye color (pn), 206, 207 

 Pseudomoims, 366, 380 

 pseudopod, 404 



pure line. 2, 3, 8, 84, 138, 162, 171, 252 

 purine and its derivatives, 281, 295-298, 297, 304, 337, 



401,402,441 

 putrescine, 382 



pyrimidine, 281, 282, 294, 295, 296, 304, 337, 401, 402 

 quadrivalent, 259 

 quadruplets, identical, 74 

 quantitative traits, 56-60, 104, 108, 262 



quantum, 201 



r region in T4, 393-i97, 448 



r (roentgen) vs. rad unit, 178 



rabbit, 4, 35, 62, 63, 68, 141 



race, 170,226,252-258 



radiation and mutation, 141, 147, 176-180, 200, 201, 



245-249, 336-337, S-15-S-26 

 radicals, 441 

 radio, 442 

 radioactivity, 147, 247-248, 303, 321-323, 383, 392, 



428-432 

 radish, 259, 260 



raspberry eye color (,ras), 206, 207 

 ratios, phenotypic and genotypic, 49, 51 

 ravelase, 347 



reaction, norm or range of, 4 

 receptor, 357, 404 



recessive, 1 2, 43 {see also dominance) 

 recombination, genetic, 13, 79, 94, 112, 134, 137, 



245, 290-291, 329, 409-410, 449^50 

 in bacteria, 340-347, 349-354, 356-380 

 in viruses, 382-405 

 recon, 279, 290-291, 303, 304, 345-346, 395, 445, 450 

 reconstitution, 13, 405 

 red blood cells (corpuscles), 34, 70, 287 

 regression, 58 

 replica, partial, 387, 388 



-plating, 349-354, 350, 351 

 replication, 9, 181, 344, 444 {see also gene) 

 replicon, 451 



repressor, 369, 391, 423-425 



reproduction, asexual or sexual, 5, 74, 94, 329, 330 

 reproductive barriers, 256, 257 

 reproductive disadvantage of mutants, 154-157 

 reproductive generation, 247 

 reproductive isolation, 255-260 

 reproductive potential {see fitness, biological) 

 repulsion, 114 

 research, 442, 45 1 

 respiration, 247 

 retinoblastoma, 229, 242 

 Rhyncosciara, 316 



ribonuclease (RNAase), 303, 340, 375, 405, 428 

 ribonucleic acid (RNA), 303-304, 309, 382, 403-406, 



427^36, 431, 439, 441, 447, 448 

 coding, 431^36 

 polymerase, 430, 447 

 various types of, 429-436 

 ribonucleoprotein, 303, 304, 403, 405 

 ribonucleoside (riboside), 303, 304, 430-432 

 ribonucleotide (ribotide), 303, 304, 320, 406 

 D-ribose (ribose), 298, 303, 304, All 

 ribosome, 428-436 

 rickettsia, 412 



rotational substitution, 402, 450 

 roundworm, 140, 197 

 ruby eye color {rb), 206, 207 

 rye, blue wild, 257 

 Saint Louis, Mo., 247 

 salamander, 140, 141 

 Salmonella, 341, 346, 366, 375-379, 377, 421-422 



