sympatry
Sympatry involves no geographical separation of sub-populations of individuals. Sympatric speciation events occur most often in plants by the mechanism of polyploidy in which the number of chromosomes is doubled or tripled. John Maynard Smith proposed a model called disruptive speciation, in which homozygotes might have greater fitness than heterozygotes under some environmental conditions.
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Alphabetic links to Glossary items:
◦ A ◦ B ◦ C ◦ D ◦ E ◦ F ◦ G ◦ H ◦ I ◦ J ◦ K ◦ L ◦ M ◦ N ◦ O ◦ P ◦ Q ◦ R ◦ S ◦ T ◦ U ◦ V ◦ W ◦ X ◦ Y ◦ Z ◦ animation index ◦ diagram index ◦ image index ◦ micrograph index ◦ table index ◦ sem/tem index ◦ video index ◦
Companion Sites : Gray Sites α Abiogenesis & Evolution √ Algorithms of Evolution ¤ Cancer סּ Cell Biology ~ Chemistry of Life Ω Complex Systems ººº Cyanobacteria ◊ Enzymes ₪ Evo Devo Ơ Fat ф Immunology »» Mechanisms of Evolution ○ Molecular Biology ** Origin of Life ◘ Paleogeology ¿ Refuting ID ǒ Serial Endosymbiosis ζζ Sleep • Stromatolites † Taxonomy Phylogeny ۰۰ Virus • White Sites Diagrams & Tables æ Eubacteria & Archaea φ Molecule → Molecular Paths ››› Pathways ☼ Photosynthesis • Black Sites Ǒ Endosymbiosis ō Organics •