Speciation and Its Consequences

adaptive alleles allopatric allozyme analysis anole areas assortative mating barriers Barton and Hewitt Biol biological species concept Cambridge Carson character displacement chromosomal cladistic clines complex Cracraft crickets demographic exchangeability differentiation dispersal disruptive selection distribution divergence Drosophila Ecol ecological effects Endler environment evolution evolve example extinction F₁ females Figure fossil frequency gene flow genetic drift genetic exchangeability genomes genotypes genus geographic variation groups habitat Haldane's rule host hybrid index hybrid zone individuals insects interactions island lineages loci locus male Mayr morphological mutations natural selection niche occur orchids parallelus parapatric patches Paterson pattern pennsylvanicus phenotypic plants platensis plethodontid pollination polymorphism premating punctuated equilibrium range recognition concepts recombination reinforcement relative reproductive isolation result samples scores secondary contact sexual selection song sterility subspecies sympatric speciation System systematics taxa taxonomic Templeton tension zone theory Thomomys tion traits ulations University Press xanthoptica Zool