2l8 



MENDELISM 



Gallon, F. , ii, 207 

 Gametes, nature of, 5 

 Gregory, R. P., 51 



Haemophilia, 204 

 Hamburghs, gold-pencilled, 164 

 Hardy, G. H., 179 

 Heterozygote, definition of, 25 

 Heterozygote, of intermediate 



form, 63 

 Hieracium, 24, 156 

 Himalayan rabbits, 55 

 Homostyle primulas, 52 

 Homozygote, definition of, 25 

 Hooded sweet- peas, 126 

 Horses, bay and chestnut in, 196 

 Hurst, C. C., 57, 205, 207 



Immunity in wheat, 189 

 Individuality, 168 

 Inhibition, factors for, 67 

 Intermediates, 158 



Johannsen, W. , 190 



Linkage, 137 

 Locus, 139 

 Lychnis, 116 



Maize, 131 



Mendel, G., 7, 15, 24, 156 

 Mental characters, 207 

 Mice, coat colour in, 46 



yellow, 150 

 Mimicry, 176 

 Mirabilis, 183 



Morgan, T. H., 98, 100, 103, 133 

 Mulattos, 162 

 Multiple factors, 163 

 Mutation, 78, 173 



Nageli, C, 24 



Natural selection, 10, 173, 175 

 Nettleship, E. , 203 

 Night-blindness, 203 

 Nilsson-Ehle, H., 163 

 Nucleus, 100 



Parkinson, J., 154 

 Pea comb, 29 



Peas, i6, 22, 131 

 Pigeons, 60 

 Pin-eye in primulas, 51 

 Pisum, 16, 22, 131 

 Plants, sex in, 114 

 Plymouth rocks, 88 

 Pollen, 3 



in sweet-peas, 119 

 Pomace fly, see Drosophila 

 Population, inheritance of char 



acters in a, 179 

 Potato, 114, 194 

 Presence and Absence theory, 31, 



147 

 Primula obconica, 167 

 Primulas, 28, 51, 63, 131, 167 

 Protenor, chromosomes in, 102 

 Protoplasm, 100 

 Pure lines, 192 

 Purity of gametes, 21 

 Purity of type, 197 



Rabbits, 49, 55 

 Ratios, Mendelian — 



3:1. 18 



9:3:3:1. 23, 30 



9:3:4. 48 



9:7. 46 

 Rats, 131 



Ray, John, 176 

 Recessive characters, 17 

 Repulsion between factors, 123 

 Reversion, 54, 195 



in fowls, 59 



in pigeons, 60 



in rabbits, 55 



in sweet-peas, 57 

 Rose comb, 29 



Saunders, E, R. , 50, 154 



Sebright bantams, 84, 164 



Seeds, nature of, 4 



Segregation, 20 



Selection, 193 



Sex, in plants, 114 

 in poultry, 85 

 in sweet-peas, 114 



Sheep, horns in, 71 



Shull, G. H., 116 



Silky fowls, 89, 159 



Silver and gold, in fowls, 8 



