558 Subject Index 



otocephaly, 490 

 Polydactyly, 362, 491 

 spotting, 393, 403 



Habrobracon, 206, 474 

 Hemoglobin, 180, 283 

 Hemophilus influenzae, 47 

 Hermaphroditism. See Monoecism 

 Heterochromatin, 57 flF. 



allocycly, 58, 60, 61, 63, 72 

 breakability, 128, 130 

 and centromere, 10, 67 

 chromocentral, 61, 67, 71, 73, 75, 



76, 79, 128, 138, 153, 162 

 ectopic pairing, 84 

 extra doses, 75 ff., 81, 82, 89, 162, 



385 

 in gallflies, 63 ff., 69, 74 

 heterochromatic association, 61, 72, 



190 

 heterochromatic chromosomes, 60, 



61, 63 ff., 69, 71, 75, 79, 184 

 heterochromatic heredity, 71, 86, 87, 



89, 93, 184 

 heterochromatization, 59, 80, 167, 



299, 300 

 heteropyknosis, 58, 60 ff., 73, 84 

 intercalary, 19, 71 ff., 76, 82, 85, 93 

 intranuclear differentiation, 298, 299 

 and mottling in Drosophila, 59, 76, 



79 ff., 128, 129, 138, 151, 153 

 and mottling (variegation) in maize, 



81, 93, 150, 151, 153 

 and nucleolus, 60, 71 . 

 ring of Giardina, 65, 66, 69 

 in Scarabaeus, 59 

 in Sciara, 63, 64, 67, 69, 465 

 and sex determination, 92, 93, 184, 



368, 444, 465 

 in Tenebrio, 58 

 theory of, 67 ff., 88 

 Homoeotic mutants. See Drosophila 

 Hormones 



gene-produced, 248, 249, 282, 285, 



312 ff., 402 ff., 419 

 generalized type, 248, 282, 285, 



312 ff., 402 ff., 419, 421 

 molting in insects, 264, 404 ff. 

 plant hormones, 407, 408 

 sex hormones, 403, 404 

 Hymenoptera, 473 ff. 



Idiochromatin, 278, 305 

 Inductors, 312, 325 ff., 419 



Industrial melanism, 479 



Infusoria. See also Paramecium; Stentor 



division, 11 



fields, 11, 63, 290 



kinetics, 11, 63, 290, 302 



macronucleus, 291, 301, 302, 304 



noncellular, 301, 304 

 Insects 



embryonic determination, 328, 402 



epidermal differentiation. See Hor- 

 mones 



germ track. See Germ track 



inductors, 328, 402 



molting genetics, 405 ff. 



molting, hormonal, 264, 404 ff. 



symbionts, ■220, 221 

 Integration, 408, 490 



embryonic, 408 ff., 417, 419 

 Interaction of mutants, 387 ff. 

 Intersexuality 



in Amphibia, 444, 458, 471 



Beaded-Minute in Drosophila, 92, 

 200, 450, 456 



in birds, 458 



in D. melanogaster, 92, 93, 200, 

 337 ff., 431 ff., 458 



in D. virilis, 92, 458 



in Lymantria, 92 ff., 200, 216, 334 ff., 

 406, 425 ff., 457, 458, 471 



in Melandrium, 338, 431, 437 ff., 471 



and monoecism, 451 



morphology, 93, 458 



mosaic, 94 



organ development, 338, 458 ff. 



in plants, 436, 444, 455 



potency, 367 



in Salix, 456 



in Solenobia, 94, 458 ff. 



in species crosses, 200, 431, 455, 456 



in Streptocarpus, 93, 200, 217, 455 



time law, 338, 457 



triploid, 94, 337 ff., 431 ff., 449, 

 458 ff. 



turning point, 338, 457, 458 ff. 

 Isoalleles. See Allelism 



Kappa particles, 227 

 Karyotype, 482 ff. 

 Kinetics, 334, 335, 389 

 Kinetics, 10, 218, 302 

 Kinetosome, 11 ff., 16, 241, 302 



Lepidoptera 



egg, 12, 25, 54, 286, 402 



