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- effective population size
- The population size that is relevant for random genetic drift. The actual number of individuals in a population that are reproducing.
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- electromorph
- A variant protein (isozyme or allozyme) detected by its distinct electrophoretic mobility.
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- electrophoresis
- A technique that separates dissolved or colloidal particles subjected to an electrical field according to their mobilities. Electrophoretic mobility depends on the size, three-dimensional geometry, and electrical charge of the particle.
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- EMBL
- European Molecular Biology Laboratories.
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- endosymbiosis
- A mutually beneficial relationship between two organisms in which one, the endosymbiont, lives within the tissues or the cells of the other, the host.
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- endosymbiotic theory
- The proposal that self-replicating cellular organelles, such as the mitochondria and the chloroplasts, were originally free-living organisms that entered into a symbiotic relationship with nucleated cells and subsequently lost their ability to survive independently.
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- enzyme
- A protein or complex of proteins that catalyzes a specific chemical reaction.
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- eubacteria
- Prokaryotes that incorporate muramic acid into their cell walls. All bacteria exclusive of the archaebacteria. One of the three primary lines of descent in the living world.
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- eukaryote
- An organism having a true nucleus and membraneous organelles. One of the three primary lines of descent in the living world.
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- exon
- A DNA segment of a gene, the transcript of which appears in the mature RNA molecule.
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- exon duplication
- The creation of duplicate copies of an exon within a single gene.
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- exon insertion
- The incorporation of one or more exons from one gene into another.
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- exon shuffling
- Strictly, exon duplication and exon insertion. Often used synonymously with exon insertion.
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- expected heterozygosity (see heterozygosity, gene diversity)
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