596 



Subject Index 



Y chromosome {continued) 

 behavior of at meiosis, 71 

 deficiencies in, 391 

 genes on, 70, 95, 196 

 heterochromatin in, 223 



ratio of to X chromosome, 507, 

 oOS 



Y chromosome genes, dominance of, 



105 



Y chromosome inheritance, 95, 104, 



105 



Z chromosome, 69, 70, 481, 483, 484 

 Zea mays, B-type chromosomes in, 

 411 

 chromosomal chimeras in, 416 

 chromosomes in, 124, 125 

 deficiencies in, 392, 393 

 dent, 81 

 dioecious, 512 

 flint, SI 



genes, anthocyanin, 154, 155, 157, 

 15S, 164. 166, 188, 280, 320 

 brown midrib. 175, 176, 177, 178, 



179, 188, 395 

 colored aleurone, 156, 175 ff., 

 188, 203, 204, 236, 237, 259, 

 279, 280, 327, 329 

 crinkly leaves, 124, 127, 128, 129, 



132, 133, 166, 188, 320 

 lazy, 309, 310 

 ligiileless, 136, 188 

 nana, 166, 188, 311 

 pericarp color, 30, 31, 188, 279, 



280 

 pm-ple plant color, 124 ff., 188, 



241. 320 

 ragged leaf, 154, 155, 157, 158, 



164, 166, 188 

 shrunken, 156, 188, 329 



Zea mays, genes {continued) 

 silkless, 188, 512 

 tassel seed, 188, 511 

 virescent, 136, 175, 176, 177, 178, 



179, 188, 542 

 waxy, 188, 203, 204, 236 

 yellow endosperm, 188, 443 

 genes for sex in, 511, 512 

 genetic and cytological crossing 



over in, 203, 204 

 haploids, 437 

 heterosis in, 368, 384, 387 

 hybrid vigor in, 384, 385, 386, 387, 



388 

 inbreeding in, 367, 384 

 induction of polyploids in, 474 

 number of chromosomes in, 6, 11, 



26, 140, 187 

 number of genes in, 16 

 number of linkage groups in, 187 

 partial linkage map of, 188 

 pod, 81 

 pop, 81 



reciprocal translocation in, 203 

 selection in, 378, 379 

 semi-sterile, 406, 408 

 sex determination in, 510, 511, 512 

 sex reversal in, 510, 511 

 sugary (sweet), 81, 329, 443 

 sun-red, 30, 31 

 trisomic, 429 

 univalent in, 416 

 unstable genes in, 241 

 variegated pericarp, 237 

 xenia in, 443 

 Zygote, 48, 50, 52, 502, 503, 504, 517, 



518 

 Zygote lethals, 253, 254, 260 

 Zygotene, 53. 54, 55, 56, 57, 71, 76, 

 434 



