346 



Tatum, 163 



Taxonomy, structure imposed on nature, 



307 

 Tecumseh, 291 

 Telophase, 28-34 

 Temperate phages, 163 

 Template, 19, 20, 21 

 Tenninalization, 32, 34 

 Termites, 229 

 Territoriality, 80 

 Territories, interspecific, 240 

 Tctracoccus ilicifolius, 82 

 Tetmnettra tthni, 205 

 Thelytoky, 200, 205 

 Thoday, J. M., 248, 249 

 Thysanoptera, 200 

 Tiger lilies, 190 



Tiger swallowtail butterfly, 212 

 Tinbergen, 128 

 Tobacco, 291 

 Tobgy, 185 

 Tools, use of, 285 

 Towhees, 240 

 Trans state, 38 

 Transduction, 163, 164 

 Transfer RNA, 18, 27 

 Transformation, 161, 164 

 Transient polymorphism, 131 

 Translocation, reciprocal, 47, 49, 50, 177, 



180, 183, 184, 186 

 Tree kangaroos, 265 

 Tree shrews, 283 

 Treponema pallidum, 87 

 Trifolium repens, 146 

 Triplets, 17, 18, 20, 21 

 Trophic levels, 86 

 Tuatara, 251, 256 

 Tulips, 190 



Turdus ericetorum, 128, 133 

 Twitty, 79, 81 



Ultraviolet light, 9 

 Unicellular organisms, 57 

 Unique events, 73 

 Univalents, 32, 190, 191 

 Urstis americanus, 256 



arctos, 257 



horrihilis, 256 



maritimus. 257 



middendorffi, 257 



Variance, components of, additive genetic, 

 53 

 dominance, 53 

 environmental, 52, 53 

 epistatic, 53 



gene-environment interaction, 53 

 genetic, 52, 53 

 nonadditive, 53 

 phenotypic, 52 

 remainder, 53 

 Variation, 37 

 cUnal, 232 



in animals, 215 

 in plants, 214 

 continuous, 52 

 discordant, 252 

 ecotypic, 213 



geographic, 212, 214, 219, 230 

 intrapopulational, 213 

 patterns of, 307 

 quantitative, 52 

 reticulate, 258 

 Vaurie, 231 



Vegetative reproduction, 31, 74, 190, 196 

 Verbal communication, 286 

 Vertical speciation, 259 

 Violets, 197 

 Vipers, pit, 265 

 Virgin births, 290 

 Virginia deer, 87 

 Viruses, 162, 164, 165 



RNA type, 164 

 Vivipary in plants, 198 

 Vocahzation in sympatric birds, 240 



Waddington, C. H., 60, 68, 156, 159 



Wagner, 192-194 



Wald, 8 



Warbler finch, 224, 229 



Wastage of gametes, 169, 182 



Water molds, 168 



Water snakes, 137, 151 



Water striders, 31 



Watson-Crick model, 16 



Weevils, 204, 275 



Weinberg, 123 



West, D. A., 308, 314 



Western Europe, culture of, 291, 296-298 



Whales, 270 



White, M. J. D., 43, 189, 203, 207 



Whooping cranes, 82 



