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. |
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Pagina 126
... pollen from one flower to another on the same plant is genetically the same as pollination within a single flower . But even in such plants there are many ways of reducing the likelihood of selfing . Stigmas commonly are receptive to pollen ...
... pollen from one flower to another on the same plant is genetically the same as pollination within a single flower . But even in such plants there are many ways of reducing the likelihood of selfing . Stigmas commonly are receptive to pollen ...
Pagina 140
... pollen source ( Figure 11 ) . Similarly , in insect - pollinated plants most pollen is carried only very short distances , al- though a small proportion is carried to much greater distances and may contribute importantly to gene flow ...
... pollen source ( Figure 11 ) . Similarly , in insect - pollinated plants most pollen is carried only very short distances , al- though a small proportion is carried to much greater distances and may contribute importantly to gene flow ...
Pagina 141
... pollen source Plants to south of pollen source FIGURE 11 Gene flow in corn , a wind - pollinated plant . The vertical axis F gives the proportion of seeds fertilized by a different genetic strain in plants set at distances D to the ...
... pollen source Plants to south of pollen source FIGURE 11 Gene flow in corn , a wind - pollinated plant . The vertical axis F gives the proportion of seeds fertilized by a different genetic strain in plants set at distances D to the ...
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 Amer amino acid ancestor animals average behavior Biol biological birds bristle cells Chapter characters chromosome coefficient coevolution common competition copies correlation developmental differentiation distribution divergence Dobzhansky Drosophila melanogaster ecological effect environment environmental enzyme equilibrium evidence evolution evolutionary change evolved example extinction factors females Figure fitness fossil record function Futuyma gametes gene conversion gene family gene flow gene frequencies genetic drift genetic variation genome genotypes geographic heritability heterozygotes heterozygous homologous homozygotes homozygous host human hybrid inbreeding increase individual insects interactions Lewontin linkage disequilibrium loci locus males mammals mating mechanisms molecular morphological mutation natural selection neoteny nucleotide occur offspring organisms paedomorphosis pairs parasites pattern phenotypic phylogenetic phylogeny plants polymorphism predators prey proteins pseudogenes random recombination segments sexual similar speciation structure sympatric Syst theory tion traits transposable elements University Press variable variance vertebrates York