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 44
No variation due to environment Frequency in the population One gene pair ( Aa
x Aa ) 1AA 2Aa 1aa 30 12 . 5 percent of variation due to environment Two gene
pairs ( AaBb x AaBb ) . 4AaBb 1AABB 2Aabb 1 A Abb 2AaBB 1aabb 2aaBb ...
No variation due to environment Frequency in the population One gene pair ( Aa
x Aa ) 1AA 2Aa 1aa 30 12 . 5 percent of variation due to environment Two gene
pairs ( AaBb x AaBb ) . 4AaBb 1AABB 2Aabb 1 A Abb 2AaBB 1aabb 2aaBb ...
Pagina 450
0 20 40 60 80 Divergence time , Myr FIGURE 3 The number of base pair
differences per site between mitochondrial DNA of pairs of species is plotted
against the estimated time since their most recent common ancestor . Sequence
difference ...
0 20 40 60 80 Divergence time , Myr FIGURE 3 The number of base pair
differences per site between mitochondrial DNA of pairs of species is plotted
against the estimated time since their most recent common ancestor . Sequence
difference ...
Pagina 488
Slatkin ( 1980 ) , using a quantitative genetic model ( Chapter 7 ) , assumed that
the intensity of competition between any two phenotypes does not depend on
which species they represent , but only on their 0 . 155 Pairs - Expected -
Observed ...
Slatkin ( 1980 ) , using a quantitative genetic model ( Chapter 7 ) , assumed that
the intensity of competition between any two phenotypes does not depend on
which species they represent , but only on their 0 . 155 Pairs - Expected -
Observed ...
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Sommario
CONCEPTIONS AND MISCONCEPTIONS | 7 |
ADAPTATION AND ENVIRONMENT | 19 |
COMPLEX INTERACTIONS AMONG SPECIES | 34 |
Copyright | |
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adaptive advantage allele allele frequency America appear arise associated average become behavior biological birds caused Chapter characteristics characters chromosome common competition conversion copies correlation depends described determined developmental differentiation direct distribution divergence Drosophila ecological effect elements environment enzyme equilibrium evidence evolution evolutionary evolved example exist expression extinction factors Figure fitness fossil frequency function gene genetic genetic drift genotypes geographic greater groups growth higher host human hybrid important increase individual insects interactions isolation less lineage loci locus lower major males mating mean mechanisms morphological mutation natural selection occur organisms origin pairs pattern phenotype plants Pleistocene polymorphism population possible predators probability reduced region relationships relative represent reproductive response separate sequence similar single speciation species structure taxa term theory tion trait usually variance variation vary