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18p may refer to: * A sub-section of Chromosome 18 (human) ** Monosomy 18p ** Tetrasomy 18p Tetrasomy 18p is a genetic condition that is caused by the presence of an isochromosome composed of two copies of the short arm of chromosome 18 in addition to the two normal copies of the chromosome. It is characterized by multiple medical and ... See also * P18 (other) {{Letter-Number Combination Disambiguation ...
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Chromosome 18 (human)
Chromosome 18 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 18 spans about 80 million base pairs (the building material of DNA) and represents about 2.5 percent of the total DNA in cells. Genes Number of genes The following are some of the gene count estimates of human chromosome 18. Because researchers use different approaches to genome annotation their predictions of the number of genes on each chromosome varies (for technical details, see gene prediction). Among various projects, the collaborative consensus coding sequence project ( CCDS) takes an extremely conservative strategy. So CCDS's gene number prediction represents a lower bound on the total number of human protein-coding genes. Gene list The following is a partial list of genes on human chromosome 18. For complete list, see the link in the infobox on the right. Diseases and disorders The following diseases are some of those related to genes ...
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