Genetic saturation is the result of multiple substitutions at the same site in a sequence, or identical substitutions in different sequences, such that the apparent sequence divergence rate is lower than the actual divergence that has occurred. When comparing two or more genetic sequences consisting of single nucleotides, differences in sequence observed are only differences in the final state of the nucleotide sequence. Single nucleotides that undergoing genetic saturation change multiple times, sometimes back to their original nucleotide or to a nucleotide common to the compared genetic sequence. Without genetic information from intermediate taxa, it is difficult to know how much, or if any saturation has occurred on an observed sequence. Genetic saturation occurs most rapidly on fast-ev
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| - Genetic saturation is the result of multiple substitutions at the same site in a sequence, or identical substitutions in different sequences, such that the apparent sequence divergence rate is lower than the actual divergence that has occurred. When comparing two or more genetic sequences consisting of single nucleotides, differences in sequence observed are only differences in the final state of the nucleotide sequence. Single nucleotides that undergoing genetic saturation change multiple times, sometimes back to their original nucleotide or to a nucleotide common to the compared genetic sequence. Without genetic information from intermediate taxa, it is difficult to know how much, or if any saturation has occurred on an observed sequence. Genetic saturation occurs most rapidly on fast-ev (en)
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| - Genetic saturation is the result of multiple substitutions at the same site in a sequence, or identical substitutions in different sequences, such that the apparent sequence divergence rate is lower than the actual divergence that has occurred. When comparing two or more genetic sequences consisting of single nucleotides, differences in sequence observed are only differences in the final state of the nucleotide sequence. Single nucleotides that undergoing genetic saturation change multiple times, sometimes back to their original nucleotide or to a nucleotide common to the compared genetic sequence. Without genetic information from intermediate taxa, it is difficult to know how much, or if any saturation has occurred on an observed sequence. Genetic saturation occurs most rapidly on fast-evolving sequences, such as the hypervariable region of mitochondrial DNA, or in short tandem repeats such as on the Y-chromosome. In phylogenetics, saturation effects result in long branch attraction, where the most distant lineages have misleadingly short branch lengths. It also decreases phylogenetic information contained in the sequences. (en)
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