ree kinds of 1, 2, 4
Eye color 13
Eyeless 66, 115

Factorial theory 89
Factors of Drosophila 143
Fantails 172, 175
Fertilization 91
Fish 16, 20, 21
Flatworms 22
Fluctuations 12
Forked bristles 106
Fowl 77
Fused veins 107, 108

Galton 154
Geneticist 26
Germ-plasm 142
Geoffroy St. Hilaire 27
Giant 114
Gill-slits 20, 21, 23
Groups I, II, III, IV 100-118

Haeckel 15
Haemophilia 77
Heliotropism 106, 107
Himalyan rabbits 83
History 1, 6
Hoge 66
Horse, evolution of 6

Indian corn 172, 173
Interference 137, 138

Janssens 132
Jaunty wing 111
Jennings 161, 181-184, 186
Johannsen 156, 157, 159-161, 166, 182

Lamarck 31-34
Langshan 77
Leaves 147
Leidy 186
Lethal 105
Linkage groups 103
Lizard 23
Localization of factors 118

MacDowell 155, 170, 171
Macritherium 191
Mammal 16, 21, 23
Man 20, 77, 125, 126
Map of Chromosomes 136
Maroon eye color 114
Mendel 40, 41, 52, 89
Mendelian heredity 39
Mendel's law 41-59, 64, 124
Mendel's second law 52
Mesenchyme cells 22
Mesoderm cells 22
Metaphysician 30
Mice 33, 178
Middleton 183
Miniature wing 108
Mirabilis 42
Modifiers 163, 164, 170, 171
Molluscs 22
Mouse 83
Muller 112, 167
Mutations 35, 39, 84

Naegeli 34, 35
Natural Selection 36, 145, 146, 187-194
Nisus formativus 34
Non-disjunction 139-142
Notch wing 104-106
Nucleus 91

Origin of Species 35, 145
Orthogenesis 34

Paleontology 24-27
Papilio polytes 63
Papilio turnus 63
Paramecium 181, 182
Paratettix 81
Peach eye color 114
Pea comb 54
Pearl 161
Peas 47
Pigeons 172, 174, 175
Pink eye color 114, 115
Planarian 22
Plymouth Rock 77
Podarke 22
Polar bodies 126
Pole arms 5
Protozoa 181
Pseudo-parthenogenesis 183
Purple eye color 109
Purpose 4

Rabbits 83, 170
Rats 176-180
Reduction division 182
Reproductive cells 96
Ruby eye color 106
Rudimentary organ 116
Rudimentary wing 70, 71, 107

Sable body color 107
Science definition of 6
Segregation 41
Selenka 94
Sepia eye color 13, 114
Sex chromosomes 118
Sex linked inheritance 75, 118-130
Sexual dimorphism 62
Sheep 33
Single comb 54
Sooty body color 50, 114, 115
Speck 68, 69, 111
Spencer 145
Spermatozoon 91, 98
Stars, evolution of 6
St. Hilaire 27-30
Strap wing 110, 111
Stumpy wing 11
St