Evolutionary BiologyCovers 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. |
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Pagina 132
One factor that can lower the effective population size is an unbalanced sex ratio
. If , for example , males guard harems of females against other males , the few
males that reproduce contribute disproportionately to subsequent generations ,
so ...
One factor that can lower the effective population size is an unbalanced sex ratio
. If , for example , males guard harems of females against other males , the few
males that reproduce contribute disproportionately to subsequent generations ,
so ...
Pagina 136
1 , No = 2 102 108 104 106 Time in generations FIGURE 9 Effects on genetic
variation of a bottleneck in population size , as in a newly founded population
beginning with two individuals ( solid lines ) or ten individuals ( dashed lines ) .
1 , No = 2 102 108 104 106 Time in generations FIGURE 9 Effects on genetic
variation of a bottleneck in population size , as in a newly founded population
beginning with two individuals ( solid lines ) or ten individuals ( dashed lines ) .
Pagina 175
In view of ecological estimates of effective population sizes ( Chapter 5 ) , these
figures seem reasonable . POPULATION FITNESS AND GENETIC LOAD When
allele frequencies change by natural selection and the average fitness W rises , it
...
In view of ecological estimates of effective population sizes ( Chapter 5 ) , these
figures seem reasonable . POPULATION FITNESS AND GENETIC LOAD When
allele frequencies change by natural selection and the average fitness W rises , it
...
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Sommario
CONCEPTIONS AND MISCONCEPTIONS | 7 |
Chapter | 18 |
THE EFFECT OF DENSITY | 24 |
Copyright | |
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Parole e frasi comuni
adaptive advantage allele frequency America animals appear arise average become behavior biological birds caused Chapter characteristics characters chromosomes common competition condition correlated depends derived determined differentiated direct distribution diversity Drosophila ecological effect environment enzyme equilibrium evidence evolution evolutionary evolved example exist extinction factors families favor females Figure fitness fossil function gene gene flow genetic drift genotypes geographic greater groups growth heterozygotes higher human hybrid important increase individual interactions isolation less linkage loci locus lower major males mammals mating mean mechanisms morphological mutation natural selection occur offspring organisms origin pairs pattern phenotype plants Pleistocene polymorphic population possible predators present probability recombination reduced region relative represent reproductive response sequence similar single sometimes speciation species structure taxa term theory tion trait usually variance variation vary
Informazioni bibliografiche
| Titolo | Evolutionary Biology |
| Autore | Douglas J. Futuyma |
| Edizione | 2, illustrata |
| Editore | Sinauer Associates, 1986 |
| Provenienza dell'originale | la University of Michigan |
| Digitalizzato | 27 gen 2010 |
| ISBN | 0878931880, 9780878931880 |
| Lunghezza | 600 pagine |
| Esporta citazione | BiBTeX EndNote RefMan |