658 
Fowls, Seabright * Hamburg, 500 
secondary sexual characters, 548 
sex-linked inheritance, 209, 539 
trapnesting, 592 
variation in, 477 
White Leghorn, 478, 579 
White Plymouth Rock, 478, 479, 579 
White Plymouth Rock * White 
478 
Wyandotte, 539 
Fraximus, 1 hybrids in, 365 
Free-martin, 545, 550 
Freeman and Johnson, Puccinia graminis, 412 
Frequency distributions in quantitative inherit- 
ance, 179, 183 
graphs, 39 
table, 38 
Fruit fly, Drosophila ampelophila. 
Fruits, deciduous tree, 393 
disease of pomaceous, 407 
heterosis in, 364 
species crosses in, 297 
and varieties, 302 
top-working poor trees, 391 
Fruwirth, alfalfa, 296 
“Die Ziuchtung der landwirtschaftlichen 
Kulturpflanzen,”’ 299 
hybridization, 287 
Functional modifications, transmission of, 491 
Fusarium, vasinfectum. tracheiphilum, and 
niveum, 413 
Leghorn, 
G 
Galloway, seed and plant introduction, 209. 
Galloway and Dorsett, violets, 391 
yalton, biometrical method, 439 
law of ancestral inheritance, 5, 250, 251 
observational method, 5 
regression, 5, 55, 252 
Galtonian regression, in pure lines, 252 
Gametes, 70, 72, 73 
cross-over, 119 
male and female producing, 540 
non-functional in species hybrids, 234, 243 
number of different kinds in Mendelian 
experiments, 100 
Gametogenesis, 2 
Ganong, Scilla, 25 
Gates, number of chromosomes, 263, 255 
(nothera, 278 
rubricalyx, 284 
somatic segregation, 274 
Giirtner, Nicotiana crosses, 229 
species hybrids, 227, 228, 230, 231, 438 
Garton, grains, 296 
Gaur X domestic cow, 520 
Gayal * domestic cow, 520 
Geddes and Thomson, sex-determination, 544 
Genes, 71 
Genetic analysis, goal of, 608 
constitution, and sex-determination, 218 
of Ff. individuals, 186 
of gametes, 88 
INDEX 
Genetic constitution of pea plants, 70, 71 
of phenotypes, 72, 73, $9 
data, methods of dealing with, 95 
on animals, 608 
recording, 603 
factors, alterations in, 263 
investigation, 609 
knowledge, need of, 609 
ratio, 87, 96, 100, 107, 112, 126 
variability and breeding, 459 
Geneticists’ investigations, 610 
Genetics, application of, 11 
content of, 1 
defined, 1 
founded by Mendel, 439. 
in agriculture, 12 
prerequisites for, 10 
problems of, 4 
relation to plant breeding, 440 
service of, 448, 450, 609 
Genotype, 72 
Genotypes, in fowls, 587 
in maize, 326 
in self-fertilized population, 320 
in wheat, 336 
not all pure lines, 256 
number of kinds in F2, 100 
progression method of computing, 97 
Genotypic selection at Svaléf, 425 
fundamental in breeding, 262 
in animal breeding, 584 
registration rules favor, 496 
Geranium, natural chimera in, 379 
variegation, 381 
Germ cells, 57, 70, 73 
combination of chromosomes in, 65 
formation, 72 
production of, 60 
Germinal, diversity in populations, 317, 462 
elements of domestic animals, 460 
recombinations and mutations, 453 
Germ-plasm and soma, 2, 485, 490 
architecture of, 459 
continuity of, 485, 488 
isolation of, 488 
Gernert, teosinte hybrids, 410 
Geum, vegetative vigor in species hybrids, 230 
Gibbs, seed and plant introduction, 299 
Gideon, apple breeding, 295 
Gigantism due to factors, 194 
due to tetraploidy, 264 
Gilmore, timothy, 294 
Gladiolus, 438 
cardinalis and G. tristis, 271 
colvillei, ‘‘The Bride,’”’ 270 
chimeras, 381 
species and varieties, 302 
Glaser, chromatin, 264 
Glucosids, transmission from stock to scion, 384 
Glycogen, stereoisomeric forms, 266 
Goats, sex-determination in, 536 
Godron, wheat, 438 
Goldschmidt, effect of environment, 22 
free-martin, 545 
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