176 



MENDELISM 



Johannsen, W. , 147 

 Lop-eared rabbits, 122 



Mendel, 7, 15, 24, 123 

 Mental characters, 165 

 Mice, inheritance of coat colour in, 



46 



Mimicry, 133 

 Mirabilis, 140 

 Morgan, T. H., 106 

 Mulattos, 1 20 

 Mutation, 77, 127 



Nageli, C. , 24 



Natural selection, 10, 130, 132, 138 

 Nettleship, E. , 160 

 Night-blindness, 160 



Pararge egeria, 122 

 Parkinson, J. , 112 

 Pea comb, 29 



Peas, coloured flowers in, 22 

 Peas, tall and dwarf, 16 

 Pigeons, 79 

 Pin-eye in primulas, 51 

 Pi sum, 15 



Primulas, 28, 51, 63, 86 

 Pollen, 3 



Pollen of sweet peas, 84 

 Pomace fly, 106 



Population, inheritance of char- 

 acters in a, 136 



Presence and Absence theory, 31 

 Pure lines, 149 

 Purity of gametes, 21 

 Purity of type, 143 



Rabbits, 49, 55 



Ratios, Mendelian ^^ 



3:1, 18 



9:3:3:1, 23, 30 



9:3:4, 48 



9:7. 46 

 Ray, John, 133 

 Recessive characters, 17 

 Repulsion between factors, 83 



Reversion, 54, 152 



in rabbits, 55 

 - in sweet peas, 57 



in fowls, 59 



in pigeons, 60 

 Rose comb, 29 



Saunders, E. R. , 50, 112 



Seeds, nature of, 4 



Segregation, 20 



Selectton, 150 



Sheep, horns in, 71 



Silky fowls, 27, 97 



Single comb, 29 



Species, nature of, 138 



Species, origin of, 10 



Speckled wood butterfly, 122 



Spermatozoa, 3 



Sports, 135 



Staples-Browne, R. , 61 



Sterility, 140 



Sterility in sweet peas, 85 



Stocks, double, 112 



Stocks, hoariness in, 50 



Sweet pea, colour in, 41, 74 

 history of, 76 

 inheritance of hood in, 82 

 inheritance of size in, 57 



Telegony, 154 

 Thrum-eye in primulas, 51 

 Toe, extra toe in poultry, 70 

 Tschermak, E., 26 



Unit-character, definition of, 28 

 Variation, 13, 127, 129 



Walnut comb, 29 

 Weismann, A., 12 

 Wheat, beard in, 69 



experiments with, 145 

 White, dominant in poultry, 67 

 Wilson, J., 155 



Yellow mice, no 

 Zygotes, nature of, 5 



Printed by R. & R. CLARK, LIMITED, Edinburgh. 



