INDEX 



Aberrant, form and chromosome number, 203 



forms in hybrid races of Antirrhinum, 248 



organisms, 276 



Aberrations, chromosome, 203, 274, 285 

 Abnormal abdomen in Drosophila, 134 

 Abraxas, chromosomes in, 208 



grossulariata X lacticolor, 200, 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, 280 



and natural selection, 439 

 dixies calopus, 528 



yEgilops triticoides, hybrid origin, 438 

 Agar, mutation, 280 

 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, 103 

 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 Fi results, 97 

 Alkali resistance, 401 



Alkaloids, transmission from stock to scion, 384 

 Allelomorph, 72 



multiple, 155, 210 



normal, usually dominant to a mutant factor, 

 445 



of white-eye factor, 74 



Allelomorphs, multiple, 156, 210 

 quadruple, 210, 225 

 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 Drooo- 



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, 405, 470 

 Ancestral inheritance, law of, 5 

 Ancestry, diversity of, in domestic animals, 460 

 Andalusian 'owls, 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 

 r61e 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, 223 



intermediate expression, 147 

 linkage, 125 



649 



