2IO 



Outline of Genetics 



Multiple allelomorphs, 112, 119 

 Multiple modifying factors, 94 

 Mumis, E. M., 32 

 Mutation, 6, 109, 119 

 Mutationists, 88 

 Mutilations, inheritance of, 17 



Nemec, B., 146 



Neo-Darwinians, 13 



Neo-Lamarckians, 13 



Nicotiana: self-sterility in, 138; 

 hybrid \^gor in, 164; wide 

 crosses in, 169 



Nilsson-Ehle, H., 72, 78, 113 

 Non-disjunction, 114, 116, 185, 



199 

 Non-Mendelian inheritance, 1 23 

 Nulliplex, 50 



Oenothera, mutation in, 6, 117 

 Origin of species, Darwin's theory, 



3 

 Orthogenesis, 8, 11 

 Oxidase, 59, 64, 67 



Parasitella, sex in, 198 

 Parasitism and sex, 198 

 Park, J. B., 138 

 Parthenogenesis, 133 

 Particulate inheritance, 123 

 Pea, jNIendel's experiments with, 



37, 157 

 Pelargonium, chimaeras in, 122; 



chlorophyll inheritance in, 123 



Pellew, C. W., 173 



Phenotype, 45 



Phycomyces, sex in, 197 



Physical basis of heredity, 41 



Physical correlation, 81 



Physiological theories of sex de- 

 termination, 181, 187 



Pigeons, sex determination in, 188 

 Presence and absence hypothesis, 

 49, 112 



Protoplasmic connections, 17 

 Puccinia, inheritance of acquired 



characters in, t,2) 

 Purity of gametes, 40 



Qualitative variations, 6 



Quantitative characters, inherit- 

 ance of, 72 



Quantitative variations, 4, 72 



Rabbits, inheritance of acquired 



eye defects in, 25, 31 

 Randolph, L. F., 125 

 Reciprocal crosses, 38 

 Reduction division, 42 

 Regression, 87, 89 

 Reversion, 59, 87, 89 

 Riddle, O., 188 



St. Hilaire, G., i 



Santos, J. K., 192 



Saunders, E. R., 70 



Sax, K., 169 



Schaffner, J. H., 195 



Segregation, 40; cytoplasmic, 123; 

 somatic, 120 



Selection, 84, 88, 112 



Selectionists, 88 



Selective fertilization, 169, 193 



Sex chromosomes, 182, 191, 192 



Sex determination, 181 



Sex-limited inheritance, 184 



Sex-linked inheritance, 184 



Shull, G. H., 157, 177, 193 



Simplex, 50 



Smith, E. A., 10 



Solan um, graft-hybrids in, 121 



Somatic mutation of genes, 119 



Somatic segregation, 1 20 



Sphaerocarpus, sex determination 

 in, 190 



Spirog>'ra, natural crosses in, 129 



Sterility, 131 



