Evolutionary biology |
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Pagina 32
Competition and adaptive radiation Beginning with Darwin, biologists have
invoked competition as an important force affecting the diversification of species.
On the one hand, competitors may prevent a species from evolving to use a
particular ...
Competition and adaptive radiation Beginning with Darwin, biologists have
invoked competition as an important force affecting the diversification of species.
On the one hand, competitors may prevent a species from evolving to use a
particular ...
Pagina 231
One can visualize species, then, as occupying different peaks on an adaptive
landscape of the kind described by Sewall Wright (Figure 13 in Chapter 6). The
genetic theories of how populations come to occupy different, incompatible
adaptive ...
One can visualize species, then, as occupying different peaks on an adaptive
landscape of the kind described by Sewall Wright (Figure 13 in Chapter 6). The
genetic theories of how populations come to occupy different, incompatible
adaptive ...
Pagina 255
In populations that consistently or frequently are small in size, selection cannot
maintain allele frequencies at an adaptive peak unless it is quite strong. If, for
example, we seek to explain the evolutionary loss or vesti- gialization of a feature
, we ...
In populations that consistently or frequently are small in size, selection cannot
maintain allele frequencies at an adaptive peak unless it is quite strong. If, for
example, we seek to explain the evolutionary loss or vesti- gialization of a feature
, we ...
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Sommario
CONCEPTIONS AND MISCONCEPTIONS | 7 |
EVOLUTION SINCE THE SYNTHESIS | 13 |
ADAPTATION AND ENVIRONMENT | 19 |
Copyright | |
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adaptive adaptive radiation allele frequency allozyme amino acid ancestor average become behavior biological birds bristle number Chapter character chromosome cladistic coefficient coevolution competition correlation Cretaceous deleterious developmental differentiation distribution diversity Drosophila Drosophila melanogaster ecological effect environment environmental enzyme equilibrium evidence evolutionary change evolved example extinction rates factors favor females Figure fitness fossil record function gametes gene conversion gene flow genetic drift genetic variation genome genotypes geographic groups habitats heritability heterozygotes heterozygous higher taxa homozygotes homozygous host human hybrid inbreeding individual insects interactions Lewontin lineage linkage disequilibrium loci locus males mammals mating molecular morphological mutation natural selection neoteny nucleotide occur offspring organisms parasites pattern phenotype phylogenetic phylogeny plants polymorphism population predators prey proteins pseudogenes rate of evolution recombination region related species relative reproductive isolation sequence sexual similar South America speciation structure survival sympatric taxa taxon theory tion trait transposable elements variance