INDEX 
Muller, Drosophila, multiple recessive females, 
121 
fertility, 554 
interference, 122 
linkage in 4th group of Drosophila, 117 
Muller and Bridges, crossing-over, time of, 121 
Multi-factor hybrids, 94 
Multimodal curves, 48 
analysis of causes, 49 
conditions of, 48 
in F2, 179, 181 
Multiple allelomorph hypothesis, 267 
allelomorphism, 155 
allelomorphs in Drosophila, 155 
in fowls, 575 
in mice, 155 
in rabbits, mice, Aquilegia, Lychnis beans, 
160 
in silkworm, 158, 210 
factors, 136 
theory of, in quantitative inheritance, 185, 
186 
Mumford, hinny, 517 
telegony, 570 
Munson, bud selection, 298, 391 
grapes, 290 
hybridization, 294 
Mutants dominant, 267, 274 
generally recessive, 267 
hermaphrodite, 215 
in hooded rats, 190 
occurrence of, 372 
propagation of 372 
seversible sex, 213 
so-called in Cnothera, 248 
white-eyed, discovery of, 74 
“Mutants,”’ classification in @nothera, 285 
results of crossing Cinothera, 247 
“‘Mutating’’ species are hybrids, 285 
Mutation and environment, 370 
bud, in cherry, 383 
in evolution, 282 | 
restriction of term, 286 
theory, 7, 8, 276 
vegetative vs. somatic segregation, 272 
Mutations, 15, 263 
affecting size, 177, 304 
and evolution, 276 
bud, 311, 315, 385 
classes, 263 
dominant, 267, 274 
factor, 110, 263, 264, 267, 268, 285, 304 
in barley, wheat, potato, tomato, 369 
in beans, 367 
in Boston fern, 315 
in breeding sugar beets, 340 
in cotton, hemp, rye, sunflower, 370 
in crop plants, 367 
in domestic animals, 462, 494 
in Drosophila comparatively rare, 267 
in homologous factors, 273 
in maize, 369 
in modifying factors, 190 
in oats, 367, 371 
Mutations in one of a pair of factors, 273, 274 
in plant breeding, 366 
in sweet peas, 304 
in tobacco, 367 
progressive and degressive, 315 
propagation of, 372 
return, 154, 213 
search for, 370 
vegetative, 270 
“Mutations,’’ de Vries’ classification, 282 
in the Evening Primroses, 276 
recombinations, 282 
Mutilation, susceptibility of some flowers, 350 
Mautilations, inheritance of, 483 
Myers, strain tests, 433 
N 
Nabours, mosaic hybrids, 152 
Paratettix, 158, 159 
zebu, 531 
Nageli, hybridization, 438, 439 
Narrow breeding, 334 
Nathusius, Bos species-hybrids, 520 
mutations in sheep, 462 
Natural chimera, investigation, 378, 381 
hybrids in autogamous species, 256 
selection, 5, 276, 286, 439 
Nature of disease-resistance, 401 
of variations, 16, 317 
Naudin, species hybrids, 227 
wheat-spelt hybrid, 438 
Neo-Lamarckians and acquired characters, 483 
Nephrolepis exaltata Bostoniensis, 312, 314 
Ameropohli, 314 
Craigi, 314 
Dwarf Boston, 313 
elegantissima, 313 
Goodi (gracillima), 314 
Harrisi, 315 
magnifica, 313, 314 
Millsii, 313 
muscosa, 313 
Piersoni, 312 
Randolphi, 315 
Roosvelti, 313 
Scotti, 313 
superbissima, 313 
Teddy Jr., 313 
verona, 313 
viridissima, 313 
Whitmani, 314 
Wm. K. Harris, 315 
germinal mutations in, 316 
Newman, creating populations, 352 
pure varieties, 341 
“*New creations,” 441 
New varieties, earliest systematic production, 287 
methods of creating, 302 
Niata cattle, 276 
Nice, effects of alcohol on mice, 493 
Nicotiana alata grandiflora, 319 
haploid chromosome number, 242 
longiflora, 182 
Digitized by Microsoft® 
665 
