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 51
... homologous chromosomes recognize each other by some unknown mechanism and become precisely aligned in synapsis . Crossing over may then occur . In one model of crossing over , nicks are made at corresponding points in a single strand of ...
... homologous chromosomes recognize each other by some unknown mechanism and become precisely aligned in synapsis . Crossing over may then occur . In one model of crossing over , nicks are made at corresponding points in a single strand of ...
Pagina 412
... homologous structures often follows or accompanies an evolutionary transi- tion from indeterminate to determinate number : the highly differentiated teeth of mammals are virtually fixed in number within species , whereas the teeth of ...
... homologous structures often follows or accompanies an evolutionary transi- tion from indeterminate to determinate number : the highly differentiated teeth of mammals are virtually fixed in number within species , whereas the teeth of ...
Pagina 435
... homologous to that of a grasshopper , but it is not homologous to any specific segment in a millipede , in which no differentiation between thorax and abdomen has evolved . Homology therefore evolves by the acquisition and fixation of ...
... homologous to that of a grasshopper , but it is not homologous to any specific segment in a millipede , in which no differentiation between thorax and abdomen has evolved . Homology therefore evolves by the acquisition and fixation of ...
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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