Subject Index 



579 



Chemicals (continued) 



induction of polyploids by, 471, 



473-476, 474 

 test for genotypes by, 328, 329, 

 330 

 Chi square, 117, 119, 135, 136, 163, 



164, 166 

 Chiasma frequency, 206, 447 

 Chiasmata, 56, 57, 58, 59, 65, 73, 148, 

 150, 174, 202 

 between X and Y chromosomes, 



154, 214 

 classical theory of, 207, 208 

 compensating, 211 

 complementary, 210, 212 

 diagonal, 211, 212 

 disparate, 211 

 in trivalents, 417, 4^8 

 independent formation of, 210 

 noncompensating, 211 

 nondisjunction and, 425 

 partial chiasmatypy and, 207, 208 

 reciprocal, 174, 210, 212, 214 

 relation of to crossing over, 152, 

 153, 202 

 Chiasmatypy, 206, 207, 208 

 Chimera. 234, 235 



chromosomal, 416, 423, 478 

 flower-color, 238, 239, 430 

 Chironomus, 74, 75, 78 

 Chlorophyceae, 503, 504 

 Chlorophyll, 136, 175 ff., 188, 312, 



540 ff. 

 Chloroplast, 4, 540, 541 

 Chondriosomes, 3 



Chromatid, 7, 10 ff., 52 ff., 56, 63 ff., 

 474, 475 

 breaking of, 57, 65, 147, 148, 150, 

 152, 157, 167, 171, 173, 174, 

 178, 179, 202 

 fusion of broken end of, 57, 148, 

 174, 202 

 Chromatid bridge, 398, 399, 4OO, 4OI, 



442, 467 

 Chromatin reticulum, 4. 6. 7 

 Chromocenter, 77, 78, 192. 222, 223, 



267 

 Chromomere, 16, 76 



Chromonema, 6, 7, 13 ff\, 14, 52 ff., 



75 ff., 219, 393, 394 

 Chromosome, 1, 6, 16, 52, 53, 58, 

 59, 64 

 daughter, 12 



effect of calchicine on, 474, 475 

 location of genes on, 171 ff., 186, 



202 

 salivary gland, 74 

 secondary constriction on, 10, 124 

 Chromosome aberrations, 2, 55, 189, 

 235, 243, 254, 390 ff., 414 ff., 

 433 ff., 471, 531, 533 

 Chromosome anastomoses, 7 

 Chromosome arms, 7, 10, 11, 63, 



65, 66 

 Chromosome circles at meiosis, 4O6, 



407, 408, 409, 427, 428, 429 

 Chromosome knobs, 10, 124, 125, 



203, 204 

 Chromosome map, 171 ff. 

 Chromosome pairing, 52, 53, 64, 

 414 ff., 491 

 between the X and Y chromo- 

 somes, 214, 215 

 without chiasmata, 213, 214, 215 

 Chromosome reduction, 65 

 Chromosome "split," 55, 63, 64, 65, 



148, 397, 475, 491 

 Chromosome structure at, meiosis, 

 52 ff., 54, 55, 56, 60, 62 

 mitosis, 7ff., 8 

 Chromosome unbalance, 419, 421, 



430 

 Class centers, 360 



Class frequency, 345, 360, 361, 362 

 CIB method, 251, 252, 253, 254, 261 

 Clone, 66, 374, 441, 518 

 Clover, flower color in, 275 

 glucosides and enzymes in, 311 

 self-sterility in, 277 

 Coconut milk, 524, 525 

 Coefficient of variability, 350, 361, 



362, 363 

 Coiling of chromosomes, 14, 15, 58, 



64 

 Coincidence, 179, 180 

 Colchicine, 473 ff ., 474, 475 



