584 



Subject Index 



Environment (continued) 



plant and animal breeding and, 

 377, 381 

 Environmental differences, 225 

 Enzyme, 305 ff., 306, 323, 324, 328 

 Ephestia, 309 



Epistasis, of a dominant gene, 321, 

 322 



of a recessive gene, 323 



of dominant and recessive genes, 

 325, 326, 328 



of polygenes, 358 

 Equation division. 65, 72 

 Equator, 9, 10, 59. 63 

 Equatorial plate, 9, 10, 11, 64 

 Erythroblastosis foetalis, 292. 293, 



295 

 Euchromatin, 71, 77, 220, 221, 232, 



267, 411 

 Euchromosomes, 487 

 Euploid, 433 ff. 



Eurycea bisUneata, triploids in, 442 

 Evening primrose, see Oenothera 

 Evolution. 25, 516, 531 



amphidiploids and, 457 



autopolyploidy and, 453 



chromosome aberrations and, 390, 

 402, 404 



effect of temperature on, 263, 264 



gene frequencies and, 539 

 Evolution in wheat, 465, 4(^6 

 Expressivity, 32 ff., 511 



Fi generation, 83 

 Fo generation, 83 

 Factors, 16 



Feeble-mindedness, 293 

 Fertilization, 48, 66, 67, 480 

 Fish, character index in, 528 



inheritance of sex in, 70, 481, 483 



isolating mechanisms in, 522, 523 

 Fluctuations, 225, 357 

 Four o'clock, 80, 86, 346, 540 

 Fowl, barred Plymouth Rock, 98, 

 99 



blue Andalusian, 87 



breeding for egg production in, 

 380, 381, 382 



Fowl (continued) 



comb shape in, 321 



effect of colchicine on, 476, 477 



frizzle, 22, 23 



incomplete dominance in, 87 



inherited tremor in, 33, 34 

 . inhibiting genes in, 325, 326 



number of chromosomes in, 99 



Plymouth Rock, 325 



Rhode Island Red, 99 



sex reversal in, 494 



White Leghorn, 325 

 Fragaria, flower color in, 462 



hybrid in, 462, 463 

 Fragaria bracteata, 462, 463 

 Fragaria collina, 463 

 Fragaria elatior, 73, 505 

 Fragaria vesca rosea, 462, 463 

 Fragments, chromosomal, 190, 394, 



442, 509 

 Frequency curve, 348, 351 

 Fritillaria pudica, 221, 222 

 Frogs, 442 



Funaria hygrometrica, 542 

 Funaria mediterranea, 542 



Galeopsis pubescens, 458 

 Galeopsis speciosa, 458 

 Galeopsis Tetrahit, 458, 464 

 Gamete, 47, 50, 51, 66, 82. 83. 127. 

 138, 480, 502, 503, 504, 517, 518 

 Gametic elimination, 275 

 Gametophyte, 50, 434, 438, 480, 502, 

 503, 504, 514 

 chromosomal deficiencies and, 391, 



392, 415 

 effect of mutation on, 233 

 extra chromosomes and, 419, 421, 

 422 

 Gamma raj^s, 260 

 Gasteria, 61, 62 

 Gene, 5, 6, 14, 16, 17, 77 



complementary, 228, 326, 327, 328, 



329, 335, 499, 500, 501 

 contributing, 342, 346, 347, 351, 



371 

 cumulative, 331, 332, 343, 345, 353. 

 354, 357, 358, 371, 372, 385 



