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Genome
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<p>[[DNA]]<font color="#000000"br />[[RNA]]</p> <p>[[Codon]]</p> <p>[[PCR]]</p> <p> </p> <font size="3"p>The <strong>genome</strong> is the entirety of a entire set of sequences in an organism that encodes information for survival and the continuation of the species it belongs to. </p> <p> </p> <p><span style="font-size:large">Main function of genomes</span></p> <p>The main function of genome is information storage storaging and processing to form an entity that utilizes envergy energy to keep process processing signals to interact with other genomes in the whole eco-system.</font><br />
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<h2p><span idstyle="Types" class="mwfont-headline"><font color="#000000size:large">Types</font></span></h2p> <p><font colorspan style="#000000font-size:small">Most biological entities that are more complex than a virus sometimes or always carry additional genetic material besides that which resides in their chromosomes. In some contexts, such as sequencing the genome of a pathogenic microbe, "genome" is meant to include information stored on this auxiliary material, which is carried in plasmids. In such circumstances then, "genome" describes all of the genes and information on non-coding DNA that have the potential to be present.</fontspan></p> <p><font colorspan style="#000000font-size:small">In eukaryotes such as plants, protozoa and animals, however, "genome" carries the typical connotation of only information on chromosomal DNA. So although these organisms contain chloroplasts and/or mitochondria that have their own DNA, the genetic information contained by DNA within these organelles is not considered part of the genome. In fact, mitochondria are sometimes said to have their own genome often referred to as the "mitochondrial genome". The DNA found within the chloroplast may be referred to as the "plastome".</fontspan></p> <h2p><span idstyle="Genomes_and_genetic_variation" class="mwfont-headline"><font color="#000000size:large">Genomes and genetic variation</font></span></h2p> <p><font colorspan style="#000000font-size:small">Note that a genome does not capture the genetic diversity or the genetic polymorphism of a species. For example, the human genome sequence in principle could be determined from just half the information on the DNA of one cell from one individual. To learn what variations in genetic information underlie particular traits or diseases requires comparisons across individuals. This point explains the common usage of "genome" (which parallels a common usage of "gene") to refer not to the information in any particular DNA sequence, but to a whole family of sequences that share a biological context.</fontspan></p> <p><font colorspan style="#000000font-size:small">Although this concept may seem counter intuitive, it is the same concept that says there is no particular shape that is the shape of a cheetah. Cheetahs vary, and so do the sequences of their genomes. Yet both the individual animals and their sequences share commonalities, so one can learn something about cheetahs and "cheetah-ness" from a single example of either.</fontspan></p> <h2p> </p> <p><span idstyle="Sequencing_and_mapping" class="mwfont-headline"><font color="#000000size:large">Sequencing and mapping</font></span></h2p> <div class="rellink boilerplate seealso"><font colorspan style="#000000font-size:small">For more details on this topic, see Genome project.</fontspan></div> <p><font colorspan style="#000000font-size:small">The Human Genome Project was organized to map and to sequence the human genome. Other genome projects include mouse, rice, the plant <em>Arabidopsis thaliana</em>, the puffer fish, bacteria like E. coli, etc. In 1976, Walter Fiers at the University of Ghent (Belgium) was the first to establish the complete nucleotide sequence of a viral RNA-genome (bacteriophage MS2). The first DNA-genome project to be completed was the Phage Φ-X174, with only 5386 base pairs, which was sequenced by Fred Sanger in 1977 . The first bacterial genome to be completed was that of Haemophilus influenzae, completed by a team at The Institute for Genomic Research in 1995.</fontspan></p> <p><font colorspan style="#000000font-size:small">The development of new technologies has dramatically decreased the difficulty and cost of sequencing, and the number of complete genome sequences is rising rapidly. Among many genome database sites, the one maintained by the US National Institutes of Health is inclusive.<sup id="cite_ref-3" class="reference">[4]<font size="2"/sup></span>[</spanp>4 <spanp>]</span></font></sup></font></p><p><font colorstyle="#000000font-size:small">These new technologies open up the prospect of personal genome sequencing as an important diagnostic tool. A major step toward that goal was the May 2007 <em>New York Times</em> announcement that the full genome of DNA pioneer James D. Watson was deciphered.<sup id="cite_ref-4" class="reference">[5]<font size="2"><span>[</span/sup>5<span>]</span></font></sup></font></p> <p><font colorspan style="#000000font-size:small">Whereas a genome sequence lists the order of every DNA base in a genome, a genome map identifies the landmarks. A genome map is less detailed than a genome sequence and aids in navigating around the genome.<sup id="cite_ref-5" class="reference">>[6]<font size="2"/sup><spansup>[7]</spansup>6</span>]</spanp> </fonth2>Comparison of different genome sizes</suph2> <sup id="cite_ref-6" div class="referencerellink relarticle mainarticle"><span style="font -size="2:small"><span>[Main article: Genome size</span>7<span>]</spandiv> </fontp> </supp> </font></p><h2><span id="Comparison_of_different_genome_sizes" table class="mw-headlinesortable wikitable"><font colorid="#000000sortable_table_id_0">Comparison of different genome sizes </fonttbody> </spantr> </h2th>Organism type<div classimg alt="rellink relarticle mainarticle↓"><font colorsrc="#000000">Main articlehttp: Genome size</font></div><table id="sortable_table_id_0" class="wikitable sortablebits.wikimedia.org/skins-1.5/common/images/sort_none.gif"/> <tbody/th> <tr> <th><font color="#000000">Organism type<span class="sortarrow"><img alt="↓" src="http://bits.wikimedia.org/skins-1.5/common/images/sort_none.gif" /></spanth></font></th> <th><font color="#000000">Organism<span class="sortarrow">Genome size (base pairs)<img alt="↓" src="http://bits.wikimedia.org/skins-1.5/common/images/sort_none.gif" /></span></font></th> <th>mass - in pg<font color="#000000">Genome size (base pairs)<span class="sortarrow"><img img alt="↓" src="http://bits.wikimedia.org/skins-1.5/common/images/sort_none.gif" /></span></font></th> <th>Note<font colorimg alt="#000000↓">mass - in pg<span classsrc="sortarrow"><img alt="↓" src="httphttp://bits.wikimedia.org/skins-1.5/common/images/sort_none.gif" /></spanth> </fonttr> </thtr> <thtd>Virus<font color="#000000"/td>Note <span class="sortarrow"td>Bacteriophage MS2<img alt="↓" src="http://bits.wikimedia.org/skins-1.5/common/images/sort_none.gif" //td> </spantd>3,569</fonttd> <td>0.000002</thtd> <td>First sequenced RNA-genome<sup>[8]</sup></td> </tr> <tr> <td><font color="#000000">Virus</font></td> <td>SV40<font color="#000000"/td> <td>Bacteriophage MS25,224</fonttd> <td> </td> <td align="right"><font color="#000000"sup>3,569[9]</fontsup></td> <td align="right"/tr> <tr> <font color="#000000"td>0.000002Virus</fonttd> <td>Phage Φ-X174</td> <td>5,386<font color="#000000"/td>First sequenced RNA-genome <sup id="cite_ref-Fiers1976_7-0" class="reference"td> <font size="2"/td> <spantd>[First sequenced DNA-genome</span>8<spansup>[10]</spansup></font></sup></font></tdtd> </tr> <tr> <td>Virus<font color="#000000"/td>Virus </fonttd>HIV</td> <td>9749<font color="#000000"sup>SV40[11]</fontsup></td> <td align="right"> <font color="#000000"/td> <td>5,224 </fonttd> </tdtr> <tr> <td>Virus<font color="#000000"/td> </fonttd>Phage λ</td> <td>48,502<sup id="cite_ref-Fiers1978_8-0" class="reference"/td> <font size="2"td> <font color="#000000"/td> <span/tr>[ </spantr>9 <spantd>]Virus</spantd> <td>Mimivirus</fonttd> <td>1,181,404</fonttd> <td> </suptd> <td>Largest known viral genome</td> </tr> <tr> <td><font color="#000000">Virus</font>Bacterium</td> <td><font color="#000000"em>Phage Φ-X174Haemophilus influenzae</fontem></td> <td align="right">1,830,000<font color="#000000"/td>5,386 </fonttd> </td> <td>First genome of living organism, July 1995<font color="#000000"sup>[12]</fontsup></td> </tr> <tr> <td>Bacterium<font color="#000000"/td>First sequenced DNA-genome <sup id="cite_ref-Sanger1977_9-0" class="reference">td><font size="2"em>Carsonella ruddii<span/em>[</spantd>10 <spantd>]159,662</spantd> </fonttd> </suptd> <td>Smallest non-viral genome.<sup>[13]</fontsup></td> </tr> <tr> <td><font color="#000000">Virus</font>Bacterium</td> <td><font color="#000000"em>HIVBuchnera aphidicola</fontem></td> <td align="right">600,000<font color="#000000"/td>9749 <sup id="cite_ref-10" class="reference"td> <font size="2"/td> <span/tr>[ </spantr>11 <spantd>]Bacterium</spantd> </fonttd></supem>Wigglesworthia glossinidia</fontem></td> <td>700,000<font color="#000000" size="2"/td> </fonttd> </td> <td/tr> <font color="#000000" size="2">tr> </fonttd>Bacterium</td> </trtd> <trem> Escherichia coli<td/em><font color="#000000"/td>Virus </fonttd>4,600,000</td> <td> <font color="#000000"/td> <td><sup>Phage λ[14]</fontsup></td> <td align="right"/tr> <font color="#000000"tr>48,502 </fonttd>Bacterium</td> <td><font color="#000000"em>Solibacter usitatus</fontem>(strain Ellin 6076)</td> </trtd> 9,970,000<tr/td> <td> <font color="#000000"/td>Virus </fonttd>Largest known Bacterial genome</td> <td/tr> <font color="#000000"tr>Mimivirus </fonttd>Amoeboid</td> <td align="right"><font color="#000000"em>1,181,404Polychaos dubium</fontem>(</td> <td><font color="#000000"em>"Amoeba" dubia</fontem>)</td> <td><font color="#000000">Largest known viral genome670,000,000,000</fonttd> </td> 737</trtd> <tr> <td>Largest known genome.<font color="#000000"sup>Bacterium[15]</fontsup></td> </tr> <tr> <td>Plant<em/td> <font color="#000000"td>Haemophilus influenzae</fontem>Arabidopsis thaliana</em></td> <td align="right"><font color="#000000">1157,830000,000</fonttd> <td> </td> <td>First plant genome sequenced, December 2000.<font color="#000000"sup>[16]</fontsup></td> <td/tr> <font color="#000000"tr> <td>First genome of living organism, July 1995Plant<sup id="cite_ref-Fleichmann_1995_11-0" class="reference"/td> <font size="2"td><spanem>[Genlisea margaretae</spanem>12<span/td> <td>]63,400,000</spantd> <td> </fonttd> <td>Smallest recorded flowering plant genome, 2006.</sup>[16]</fontsup></td> </tr> <tr> <td><font color="#000000">Bacterium</font>Plant</td> <td><em>Fritillaria assyrica<font color="#000000"/em>Carsonella ruddii</fonttd> </emtd>130,000,000,000</td> <td align="right"> <font color="#000000"/td>159,662 </fonttr> <tr> <td>Plant</td> <td><font color="#000000"em>Populus trichocarpa</fontem></td> <td>480,000,000<font color="#000000"/td>Smallest non-viral genome. <td> <sup id="cite_ref-12" class="reference"/td> <font size="2"td>First tree genome, September 2006<span/td>[ </spantr>13 <spantr>] </spantd>Moss</fonttd> </suptd></fontem>Physcomitrella patens</tdem> </trtd> <tr> <td><font color="#000000">Bacterium</font>480,000,000</td> <td> <em/td> <font color="#000000"td>Buchnera aphidicolaFirst genome of a bryophyte, January 2008 </fontsup>[17]</emsup></td> <td align="right"/tr> <font color="#000000"tr>600,000</font <td>Yeast</td> <td><font color="#000000"em>Saccharomyces cerevisiae</fontem></td> </trtd> 12,100,000<tr/td> <td><font color="#000000">Bacterium</font> </td> <td><emsup>[18]<font color="#000000"/sup>Wigglesworthia glossinidia</fonttd> </emtr> <tr> <td>Fungus</td> <td align="right"><font color="#000000"em>700,000Aspergillus nidulans</fontem></td> <td><font color="#000000"30,000,000</td> </fonttd> </td> </tr> <tr> <td><font color="#000000">Bacterium</font>Nematode</td> <td><em><font color="#000000">Escherichia coli</font>Caenorhabditis elegans</em></td> <td align="right"><font color="#000000">4>100,600300,000</fonttd> <td> </td> <td>First multicellular animal genome, December 1998<font color="#000000"sup>[19]</fontsup></td> <td/tr> <sup id="cite_ref-13" class="reference"tr> <font size="2"td>Nematode<font color="#000000"/td> <spantd>[</spanem>14Pratylenchus coffeae<span/em>]</spantd> <td>20,000,000</fonttd> <td> </fonttd> <td>Smallest animal genome known<sup>[20]</sup></td> </tr> <tr> <td><font color="#000000">BacteriumInsect</fonttd></td> <td><font color="#000000"><em>Solibacter usitatusDrosophila melanogaster</em> (strain Ellin 6076fruit fly)</font></td> <td align="right"><font color="#000000">9130,970000,000</font></td> <td><font color="#000000"></font> </td> <td><font color="#000000"sup>Largest known Bacterial genome[21]</fontsup></td> </tr> <tr> <td><font color="#000000">Amoeboid</font>Insect</td> <td><font color="#000000"><em>Polychaos dubiumBombyx mori</em> (<em>"Amoeba" dubia</em>silk moth)</font></td> <td align="right"><font color="#000000">670530,000,000,000</font></td> <td align="right"> </td> </tr> <font color="#000000"tr>737 </fonttd>Insect</td> <td><font color="#000000"em>Largest known genome.Apis mellifera<sup id="cite_ref-Parfrey2008_14-0" class="reference">/em> (honey bee)<font size="2"/td> <spantd>[236,000,000</spantd>15 <spantd>] </spantd> </fonttr> </suptr> </fonttd>Fish</td> </tr> <tr> <td><font color="#000000"em>PlantTetraodon nigroviridis</fontem>(type of puffer fish)</td> <td>385,000,000<em/td> <font color="#000000"td>Arabidopsis thaliana </fonttd> </emtd>Smallest vertebrate genome known</td> <td align="right"/tr> <font color="#000000"tr>157,000,000 </fonttd>Mammal</td> <td><font color="#000000"em>Homo sapiens</em></fonttd> <td>3,200,000,000</td> <td>3<font color="#000000"/td>First plant genome sequenced, December 2000. <sup id="cite_ref-Greilhuber_15-0" class="reference"><font size="2"><span>[</span>16<span>]</span></font></sup></font></td> </tr> <tr> <td><font color="#000000">Plant</font></td> <td><em><font color="#000000">Genlisea margaretae</font></em></td> <td align="right"><font color="#000000">63,400,000</font></td> <td><font color="#000000"></font></td> <td><font color="#000000">Smallest recorded flowering plant genome, 2006.<sup id="cite_ref-Greilhuber_15-1" class="reference"><font size="2"><span>[</span>16<span>]</span></font></sup></font></td> </tr> <tr> <td><font color="#000000">Plant</font></td> <td><em><font color="#000000">Fritillaria assyrica</font></em></td> <td align="right"><font color="#000000">130,000,000,000</font></td> <td><font color="#000000"></font></td> </tr> <tr> <td><font color="#000000">Plant</font></td> <td><em><font color="#000000">Populus trichocarpa</font></em></td> <td align="right"><font color="#000000">480,000,000</font></td> <td><font color="#000000"></font></td> <td><font color="#000000">First tree genome, September 2006</font></td> </tr> <tr> <td><font color="#000000">Moss</font></td> <td><em><font color="#000000">Physcomitrella patens</font></em></td> <td align="right"><font color="#000000">480,000,000</font></td> <td><font color="#000000"></font></td> <td><font color="#000000">First genome of a bryophyte, January 2008 <sup id="cite_ref-16" class="reference"><font size="2"><span>[</span>17<span>]</span></font></sup></font></td> </tr> <tr> <td><font color="#000000">Yeast</font></td> <td><em><font color="#000000">Saccharomyces cerevisiae</font></em></td> <td align="right"><font color="#000000">12,100,000</font></td> <td><font color="#000000"></font></td> <td><sup id="cite_ref-17" class="reference"><font size="2"><font color="#000000"><span>[</span>18<span>]</span></font></font></sup></td> </tr> <tr> <td><font color="#000000">Fungus</font></td> <td><em><font color="#000000">Aspergillus nidulans</font></em></td> <td align="right"><font color="#000000">30,000,000</font></td> <td><font color="#000000"></font></td> </tr> <tr> <td><font color="#000000">Nematode</font></td> <td><em><font color="#000000">Caenorhabditis elegans</font></em></td> <td align="right"><font color="#000000">100,300,000</font></td> <td><font color="#000000"></font></td> <td><font color="#000000">First multicellular animal genome, December 1998<sup id="cite_ref-18" class="reference"><font size="2"><span>[</span>19<span>]</span></font></sup></font></td> </tr> <tr> <td><font color="#000000">Nematode</font></td> <td><em><font color="#000000">Pratylenchus coffeae</font></em></td> <td align="right"><font color="#000000">20,000,000</font></td> <td><font color="#000000"></font></td> <td><font color="#000000">Smallest animal genome known<sup id="cite_ref-19" class="reference"><font size="2"><span>[</span>20<span>]</span></font></sup></font></td> </tr> <tr> <td><font color="#000000">Insect</font></td> <td><font color="#000000"><em>Drosophila melanogaster</em> (fruit fly)</font></td> <td align="right"><font color="#000000">130,000,000</font></td> <td><font color="#000000"></font></td> <td><sup id="cite_ref-Adams_2000_20-0" class="reference"><font size="2"><font color="#000000"><span>[</span>21<span>]</span></font></font></sup></td> </tr> <tr> <td><font color="#000000">Insect</font></td> <td><font color="#000000"><em>Bombyx mori</em> (silk moth)</font></td> <td align="right"><font color="#000000">530,000,000</font></td> <td><font color="#000000"></font></td> </tr> <tr> <td><font color="#000000">Insect</font></td> <td><font color="#000000"><em>Apis mellifera</em> (honey bee)</font></td> <td align="right"><font color="#000000">236,000,000</font></td> <td><font color="#000000"></font></td> </tr> <tr> <td><font color="#000000">Fish</font></td> <td><font color="#000000"><em>Tetraodon nigroviridis</em> (type of puffer fish)</font></td> <td align="right"><font color="#000000">385,000,000</font></td> <td><font color="#000000"></font></td> <td><font color="#000000">Smallest vertebrate genome known</font></td> </tr> <tr> <td><font color="#000000">Mammal</font></td> <td><em><font color="#000000">Homo sapiens</font></em></td> <td align="right"><font color="#000000">3,200,000,000</font></td> <td align="right"><font color="#000000">3</fonttd> </td> <td><font color="#000000"></font></td> </tr> <tr> <td><font color="#000000">Fish</font></td> <td><font color="#000000"><em>Protopterus aethiopicus</em> (marbled lungfish)</font></td> <td align="right"><font color="#000000">130,000,000,000</font></td> <td align="right"><font color="#000000">143</font></td> <td><font color="#000000">Largest vertebrate genome known</font></td> </tr> </tbody>
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<h2><span id="Further_reading" class="mw-headline">Further reading</span></h2>
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<h2><span id="External_links" class="mw-headline">External links</span></h2>
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