i»o 



MENDELISM 



Johannsen, W. , 152 



Lop-eared rabbits, 127 



Mendel, 7, 15, 24, 128 

 Mental characters, 170 

 Mice, inheritance of coat colour in. 



Mimicry, 138 

 Mirabilis, 145 

 Morgan, T. H. , iii 

 Mulattos, 125 

 Mutation, 77, 132 



Nageli, C. , 24 



Natural selection, 10, 135, 137, 143 

 Nettleship, E., 165 

 Night-blindness, 165 



Pararge egeria, 127 

 Parkinson, J,, 117 

 Pea comb, 29 



Peas, coloured flowers in, 22 

 Peas, tall and dwarf, 16 

 Pigeons, 79 

 Pin-eye in primulas, 51 

 Pisum, 15 



Primulas, 28, 51, 63, 86 

 Pollen, 3 



Pollen of sweet-peas, 84 

 Pomace fly, 11 1 



Population, inheritance of char- 

 acters in a, 141 

 Presence and Absence theory, 31 

 Pure lines, 154 

 Purity of gametes, 21 

 Purity of type, 148 



Rabbits, 49, 55 

 Ratios, Mendelian — 



3:1. 18 



9:3:3:'^. 23, 30 



9:3:4, 48 



9:7. 46 

 Ray, John, 138 

 Recessive characters, 17 

 Repulsion between factors, 83 



Reversion, 54, 157 



in rabbits, 55 



in sweet-peas, 57 



in fowls, 59 



in pigeons, 60 

 Rose comb, 29 



Saunders, E. R. , 50, 118 



Seeds, nature of, 4 



Segregation, 26 



Selection, 155 



Sheep, horns in, 71 



Silky fowls, 27, 102 



Single comb, 29 



Species, nature of, 143 



Species, origin of, 10 



Speckled wood butterfly, 127 



Spermatozoa, 3 



Sports, 140 



Staples- Browne, R. , 61 



Sterility, 145 



Sterility in sweet-peas, 85 



Stocks, double, 117 



Stocks, hoariness in| 50 



Sweet-pea, colour in, 41, 74 

 history of, 76 

 inheritance of hood in, 82 

 inheritance of size in, 57 



Telegony, 159 

 Thrum-eye in primulas, 51 

 Toe, extra toe in poultry, 70 

 Tschermak, E. , 26 



Unit-character, definition of, 28 



Variation, 13, 132, 134 



Walnut comb, 29 

 Weismann, A., 12 

 Wheat, beard in, 69 



experiments with, 150 

 White, dominant in poultry, 67 

 Wilson, J., 160 



Yellow mice, 115 



Zygotes, nature of, 5 



Printed by R. & R. Clark, Limited, Edinburgh. 



