INDEX 
A 
Aberrant, form and chromosome number, 263 
forms in hybrid races of Antirrhinum, 248 
organisms, 276 
Aberrations, chromosome, 263, 274, 285 
Abnormal abdomen in Drosophila, 134 
Abraxas, chromosomes in, 208 
grossulariata X lacticolor, 206, 207 
sex-inheritance in, 205 
Abutilon, striatum, 382 
thomsoni, 382 
Accidental errors, 425 
Ackermann, species hybrids, 228 
Acquired characters, argument against, 484 
belief in inheritance, 482, 483, 494 
definition of, 480 
evidence against, 483, 485, 494 
of inheritance of, 489 
in animal breeding, 480 
parallel induction, 492 
supposed cases, 489 
use and disuse, 491 
Adaptation and factor mutations, 286 
and natural selection, 439 
Aides calopus, 528 
/Egilops triticoides, hybrid origin, 438 
Agar, mutation, 286 
Agouti, factors in Cavia, 225 
Agriculture antedates plant improvement, 287 
factor mutations caused, 267 
importance of mutations, 263 
Albino plants, 131 
Albinic beetles, 258 
Albinism in plants, 248 
Alcohol, effect of, on animals, 493 
Alder, Fi hybrids in, 365 
Aleurone color inheritance in maize, 83, 105, 163 
Alfalfa, clonal selection in, 298 
disease-resistant strain, 417 
extension of culture, 296 
flowers, 349 
Grimm, 296 
hybrids, 296 
hybridization of, 348 
Algebraic method of computing F» results, 97 
Alkali resistance, 401 
Alkaloids, transmission from stock to scion, 384 
Allelomorph, 72 
multiple, 155, 210 
normal, usually dominant to a mutant factor, 
145 
of white-eye factor, 74 
Allelomorphs, multiple, 155, 210 
quadruple, 210, 2 
septuple, 156 
triple, 225 
Allen, grape hybridizer, 290 
Allogamous organisms, 16 
have no pure lines, 256 
Almond and peach grafting, 383 
-peach graft-hybrid, 378 
Altenburg and Muller, truncate wings in Droso- 
phila, 168 
Alterations in genetic factors, 263 
Alternative expression vs. transmission, 275 
Althea cannabina X A. officinalis, 230 
Amateur plant breeder, 312 
Amelioration of plants and animals, 11 
American Breeders’ Association, 300 
American Breeders’ Magazine, 300 
American Genetic Association, 301 
Amphimixis, 3, 453 
Amygdalus communis-persica graft-hybrid, 378 
platycarpa X persica, 297 
Analysis of coat color inheritance, 465, 470 
Ancestral inheritance, law of, 5 
Ancestry, diversity of, in domestic animals, 460 
Andalusian fowls, see Blue Andalusian Fowls. 
Anderson, Mendelism in horses, 466 
Animal breeder, equipment of, 450 
breeding, acquired characters in, 480 
and disease, 522 
and hybridization, 508 
crossbreeding, 514 
foundation stock, 502 
history of, 443 
industry, 445 
methods of, 577 
practice, 447 
problems of, 447 
role of selection in, 494 
selection problem in, 495 
Animals, domestication of, 443 
fertility in, 551 
genetic data on, 608 
improvement of, 444 
mutation in, 462 
sex in, 536 
sterility in, 555 
variation in domestic, 453 
Anthothrips verbasci, sex-determination in, 211 
Antirrhinum, aberrant forms in hybrid races, 248 
factors, 22: 
intermediate expression, 147 
linkage, 125 
649 
‘Digitized by Microsoft® 
