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 biological birds bristle number caused cells Chapter characters chromosome cladistic coefficient coevolution competition copies correlated deleterious developmental differentiation distribution divergence Dobzhansky Drosophila melanogaster ecological effect environment environmental enzyme equilibrium evidence evolutionary change evolved example extinction rate factors favor females Figure fitness fossil record function Futuyma gametes gene conversion gene flow gene frequencies genetic drift genetic variation genome genotypes geographic groups habitats heritability heterozygotes heterozygous higher taxa homozygotes homozygous host human hybrid inbreeding increase individual insects interactions Lewontin linkage disequilibrium loci locus males mammals mating mechanisms molecular morphological mutation natural selection nucleotide occur offspring organisms pairs parasites pattern phenotype phylogenetic phylogeny plants polymorphism predators prey proteins pseudogenes random recombination relative reproductive isolation sequence sexual similar speciation structure survival sympatric taxon theory tion trait transposable elements variable variance