INDEX 



675 



Wheat, eight chromosomes, 238 



Ghirka, 372 



Gladden, 339 



Glorup, 257 



Gypsy, 337, 338 



hybridization of, 294, 345 



inflorescence, 345, 346 



maintenance of type, 257 



mutations in, 369 



natural hybrids in, 348 



pure lines, 293, 336, 372 



rust-resistant, creating, 411 

 varieties, 416 



sometimes cross-fertilized, 318 



Turkey, 336 



"Vilmorin Method," 291 



Yellow-berry, 418 



Whedale, Miss, Antirrhinum, inheritance in, 147 

 White, O. E., chimeras, 376 



fasciated plants, 130 



linkage in Pisum, 125 

 White, T. H., germinal variations, 28, 370 

 White eye color, inheritance of, in Drosophila, 74 , 

 87, 197, 208 



factor decreases vigor, 233 



mutation, 267, 269 



White eyed mutants, discovery, 74, 156 

 Whitten, Ben Davis apple, 394 



bud selection, 398 



Whitethorn-medlar chimera, 378, 379 

 Whymper, cretins, 526 

 Wickson, on Burbank, 298 

 Wieman, spermatogenesis in man, 538 

 Williams, Gladden wheat, 339 



Gypsy-wheat, 337, 338 



remnant system, 334 

 Willow, Cricket-bat, an Fi hybrid, 365 

 Wilson, E. B., heredity defined, 57 



problems.of inheritance, 4 

 Wilson, E. H., rose varieties, 310 



seed and plant introduction, 299 

 Wilson, J., color in horses, 467, 469, 470, 472, 473 



Dexter-Kerry cattle, 527 



Morton's quagga, 566 



multiple allelomorphs, 474 



sheep, 476 

 Wilt diseases, 413 



-resistant hybrids, 414, 415, 416, 417 

 von Winiwarter, chromosomes in man, 538 

 Winkler, chimeras, 375, 376, 377, 378 



graft-hybrids, 374 



Wodsedalek, chromosomes, horse, 519, 537 



determination of sex, 536 



sperm of mule, 558 



of pig, 540, 541 

 Woltereck, effect of food supply, 23 



Hyalodaphnia, 23 

 Wood, sheep, 549 



Wood and Stratton, experimental error, 430 

 Work, varieties, 432 

 TF-chromosome, 205, 209 

 Wriedt, Norway sheep, 463 

 WZ type of sex-inheritance, 205 



animals showing, 209 

 in birds, 539 



X-chromosome, 58, 74, 88, 110, 112, 114, 117, 119, 



121, 155, 196, 214, 267 

 Xenia, advantage of, in experimentation, 360 



cause of, 150 



X Y type of sex-inheritance, 196 

 animals showing, 196, 214 

 in domestic animals, 536 



Yak crossed with domestic cow, 520 

 y-chromosome, 58, 74, 88, 112, 114, 196, 214, 234 

 Yields, method of comparing, 356 



Z-chromosome, 205, 209 

 Zea, hirta, 358 

 hybrids, 359 

 mays, 358 



amylacea, 358 

 everta, 358 

 indentata, 358 

 indurata, 358 

 Zebra-ass hybrid, 557 

 Grevy, 568 



-horse crosses, 468, 520, 557, 567, 570 

 quagga-horse hybrids, 565 

 Zebu cattle, 460, 461 



disease immune, 628 

 for grading, 529 

 Gujarat, 530 

 X domestic cow, 520, 531 



