Evolutionary BiologySinauer Associates, 1986 - 600 pagine Covers the genetic, developmental, and ecological mechanisms of evolutionary change, the major features of evolutionary history as revealed by phylogenetic and paleontological studies, and material on adaptation, molecular evolution, co-evolution, and human evolution. |
Dall'interno del libro
Risultati 1-3 di 89
Pagina 130
... DRIFT ( or just genetic drift ) . So far , we have considered the effects of genetic drift on the frequencies of different alleles that are NEUTRAL with respect to fitness — that is , we suppose that they do not differ at all in their ...
... DRIFT ( or just genetic drift ) . So far , we have considered the effects of genetic drift on the frequencies of different alleles that are NEUTRAL with respect to fitness — that is , we suppose that they do not differ at all in their ...
Pagina 134
... genes are identical by descent is - F1 = [ 1 / 2N , + ( 1 − 1 / 2N ) F , − 1 ] ( 1 − u ) 2 When the rate of loss of alleles by genetic drift is balanced by the gain of new alleles by mutation , F = F - 1 Ê , and Ê is found to be = Ê ...
... genes are identical by descent is - F1 = [ 1 / 2N , + ( 1 − 1 / 2N ) F , − 1 ] ( 1 − u ) 2 When the rate of loss of alleles by genetic drift is balanced by the gain of new alleles by mutation , F = F - 1 Ê , and Ê is found to be = Ê ...
Pagina 143
... genetic differences can be explained purely by genetic drift . This analysis does not prove that these differences among populations are due to drift rather than to natural selection , but it suggests that there is no compelling reason ...
... genetic differences can be explained purely by genetic drift . This analysis does not prove that these differences among populations are due to drift rather than to natural selection , but it suggests that there is no compelling reason ...
Sommario
CONCEPTIONS AND MISCONCEPTIONS | 7 |
EVOLUTION SINCE THE SYNTHESIS | 13 |
ADAPTATION AND ENVIRONMENT | 19 |
Copyright | |
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adaptive adaptive radiation allele frequency amino acid ancestor average behavior biological birds bristle cells Chapter characters chromosome coefficient coevolution common competition copies correlated deleterious developmental differentiation distribution divergence Drosophila melanogaster ecological effect environment environmental enzyme equilibrium evidence evolution evolutionary change evolved example factors favor females Figure fitness fossil record function Futuyma gametes gene conversion gene family gene flow gene frequencies genetic drift genetic variation genome genotypes geographic groups heritability heterozygotes heterozygous higher taxa homologous homozygotes homozygous host human hybrid inbreeding increase individual insects interactions Lewontin linkage disequilibrium loci locus males mammals mating mean mechanisms molecular morphological mutation natural selection neoteny nucleotide occur offspring organisms pairs parasites pattern phenotypic phylogenetic phylogeny plants polymorphism population predators prey proteins pseudogenes random recombination related species relative reproductive isolation segments sexual similar speciation structure survival sympatric theory tion traits transposable elements variable variance vertebrates