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Nuclear DNA

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replaced with the appropriate sequence of DNA nucleotides. Because the two complementary strands of the DNA molecule are oriented in opposite directions and the DNA polymerase can only accommodate replication in one direction, two different mechanisms for copying the strands of DNA are employed. One strand is replicated continuously towards unwinding, separating the portion of the original DNA molecule; while the other strand is replicated discontinuously in the opposite direction with the formation of a series of short DNA segments called
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nucleotides, complementary to a small, initial section of the DNA strand being prepared for replication. DNA polymerase is then able to add DNA nucleotides to the RNA primer and thus begin the process of constructing a new complementary strand of DNA. Later the RNA primer is enzymatically removed and
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Meiosis creates new combinations of genetic material in each of the four daughter cells. These new combinations result from the exchange of DNA between paired chromosomes. Such an exchange means that the gametes produced through meiosis often exhibit considerable genetic variation.
209:. Everyone has a unique genetic blueprint, even identical twins. Forensic departments such as the Bureau of Criminal Apprehension (BCA) and Federal Bureau of Investigation (FBI) are able to use techniques involving nuclear DNA to compare samples in a case. Techniques used include 248:
Meiosis involves two rounds of nuclear division, not just one. Prior to undergoing meiosis, a cell goes through an interphase period in which it grows, replicates its chromosomes, and checks all of its systems to ensure that it is ready to divide.
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Anderson S, Bankier AT, Barrell BG, de Bruijn MH, Coulson AR, Drouin J, Eperon IC, Nierlich DP, Roe BA, Sanger F, Schreier PH, Smith AJ, Staden R, Young IG (Apr 1981). "Sequence and organization of the human mitochondrial genome".
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engages the separated portion of the molecule and initiates the process of replication. DNA polymerase can only connect new DNA nucleotides to a pre-existing chain of nucleotides. Therefore, replication begins as an enzyme called
325:. Each Okazaki fragment requires a separate RNA primer. As the Okazaki fragments are synthesized, the RNA primers are replaced with DNA nucleotides and the fragments are bonded together in a continuous complementary strand. 364:. Such repair processes are essential for maintaining nuclear DNA stability. Failure of repair activity to keep up with the occurrence of damages has various negative consequences. Nuclear DNA damages, as well as the 187:
and contains for example 3 billion nucleotides in humans while the structure of Mitochondrial DNA chromosome is usually closed, circular, and contains for example 16,569 nucleotides in humans. Nuclear DNA in animals is
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Prior to cell division, the DNA material in the original cell must be duplicated so that after cell division, each new cell contains the full amount of DNA material. The process of DNA duplication is usually called
268:. A key difference, however, is that during meiosis, each of these phases occurs twice — once during the first round of division, called meiosis I, and again during the second round of division, called meiosis II. 204:
Nuclear DNA is known as the molecule of life and contains the genetic instructions for the development of all eukaryotic organisms. It is found in almost every cell in the human body, with exceptions such as
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strand of DNA serves as a template to guide the synthesis of the new complementary polynucleotide of DNA. The DNA single-strand template serves to guide the synthesis of a complementary strand of DNA.
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unwinds and separates a portion of the DNA molecule after which single-strand binding proteins react with and stabilize the separated, single-stranded sections of the DNA molecule. The enzyme complex
233:. Meiosis gives rise to four unique daughter cells, each of which has half the number of chromosomes as the parent cell. Because meiosis creates cells that are destined to become 416:
are most often neutral or adaptively disadvantageous. However, the small proportion of mutations that prove to be advantageous provide the genetic variation upon which
999:"Accumulation of nuclear DNA damage or neuron loss: molecular basis for a new approach to understanding selective neuronal vulnerability in neurodegenerative diseases" 213:(PCR), which allows one to utilize very small amounts of DNA by making copies of targeted regions on the molecule, also known as short tandem repeats (STRs). 880: 123:. Each nucleotide is composed of a five-carbon sugar, a phosphate group, and an organic base. Nucleotides are distinguished by their bases: 196:, coming only from the mother. The mutation rate for nuclear DNA is less than 0.3% while that of mitochondrial DNA is generally higher. 905: 733: 919: 814: 1457: 944: 1211: 151:
state that adenine always pairs with thymine, and guanine always with cytosine. The phosphate groups are held together by a
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pathway for repair of double-strand breaks is particularly prone to mutation. Mutations arising in the nuclear DNA of the
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since each new cell contains one strand of original DNA and one newly synthesized strand of DNA. The original
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differ in many ways, starting with location and structure. Nuclear DNA is located within the nucleus of
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Freitas AA, de Magalhães JP (2011). "A review and appraisal of the DNA damage theory of ageing".
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is a persistent problem arising from a variety of disruptive endogenous and exogenous sources.
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Waters LS, Minesinger BK, Wiltrout ME, D'Souza S, Woodruff RV, Walker GC (March 2009).
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cells and usually has two copies per cell while mitochondrial DNA is located in the
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at the origin of replication. The RNA primer consists of a short sequence of
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processes that remove nuclear DNA damages. These repair processes include
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The human nuclear DNA displayed into chromosome ideograms with label from
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DNA replication begins at a specific site in the DNA molecule called the
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would result in offspring with twice the normal number of chromosomes.
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that synthesize past DNA damages in the template strand (error-prone
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and contains 100–1,000 copies per cell. The structure of nuclear DNA
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that such damages cause, are considered to be a major cause of
297: 124: 103:, found in the nucleus of eukaryotic cells. Its structure is a 61: 996: 1623: 997:
Brasnjevic I, Hof PR, Steinbusch HW, Schmitz C (July 2008).
1685: 1506: 317: 49: 408:). Mutations also arise by inaccurate DNA repair. The 252:
Like mitosis, meiosis also has distinct stages called
961: 162: 119:. Each strand is a long polymer chain of repeating 1045: 1878: 1048:"DNA damage and its links to neurodegeneration" 376:. Nuclear DNA damages are also implicated in 80:(through the mother) as in mitochondrial DNA. 1451: 1205: 1137: 1088: 1039: 990: 955: 755: 396:. A major cause of mutation is inaccurate 1465: 1458: 1444: 1212: 1198: 1046:Madabhushi R, Pan L, Tsai LH (July 2014). 841:"Identical Twins' Genes Are Not Identical" 34:DNA inside the nucleus of eukaryotic cells 1169: 1120: 1071: 1022: 183:is linear with open ends and includes 46 1143: 328: 14: 1879: 420:operates to generate new adaptations. 1439: 1193: 838: 60:. It encodes for the majority of the 155:and the bases are held together by 72:coding for the rest. It adheres to 24: 410:microhomology-mediated end joining 362:microhomology-mediated end joining 25: 1903: 1582:Micro 1144:McVey M, Lee SE (November 2008). 1861: 1860: 1219: 863:"Forensic Science - Nuclear DNA" 686:– via The Free Dictionary. 643: 634: 625: 616: 607: 598: 589: 580: 571: 562: 553: 544: 535: 526: 517: 508: 499: 490: 481: 472: 463: 454: 445: 436: 431:Human Genome Project (1990-2003) 216: 163:Differences to mitochondrial DNA 1537:precursor, heterogenous nuclear 937: 912: 898: 115:(1953) using data collected by 1667:Trans-acting small interfering 1631:Enhancer RNAs 1549:Transfer 873: 855: 832: 807: 726: 708: 690: 676: 340:have evolved a diverse set of 271: 13: 1: 1554:Ribosomal 1532:Messenger 669: 46:nuclear deoxyribonucleic acid 1064:10.1016/j.neuron.2014.06.034 1015:10.1016/j.dnarep.2008.03.010 281:. The replication is termed 199: 83: 7: 976:10.1016/j.mrrev.2011.05.001 734:"DNA: The Genetic Material" 652: 387: 139:, small bases that include 127:, large bases that include 10: 1908: 1733:Multicopy single-stranded 1577:Interferential 423: 392:Nuclear DNA is subject to 382:neurodegenerative diseases 358:non-homologous end joining 354:homologous recombinational 350:nucleotide excision repair 26: 1856: 1791: 1741: 1684: 1647:Guide 1639: 1567: 1522: 1505: 1474: 1400: 1386: 1359: 1236: 1227: 1162:10.1016/j.tig.2008.08.007 1101:Microbiol. Mol. Biol. Rev 211:polymerase chain reaction 1609:Small nuclear 949:highered.mcgraw-hill.com 881:"FBI — Nuclear-DNA Unit" 738:highered.mcgraw-hill.com 229:is a form of eukaryotic 29:New Decade, New Approach 1723:Genomic 1394:Human mitochondrial DNA 400:, often by specialized 1826:Artificial chromosomes 1614:Small nucleolar 406:trans-lesion synthesis 370:epigenetic alterations 52:contained within each 1619:Small Cajal Body RNAs 1113:10.1128/MMBR.00034-08 843:. Scientific American 720:thefreedictionary.com 334:Damage of nuclear DNA 329:DNA damage and repair 294:origin of replication 74:Mendelian inheritance 1672:Subgenomic messenger 1587:Small interfering 1559:Transfer-messenger 1413:Human Genome Project 1388:Mitochondrial genome 346:base excision repair 64:in eukaryotes, with 1420:List of human genes 815:"Mitochondrial DNA" 777:1981Natur.290..457A 153:phosphodiester bond 58:eukaryotic organism 1701:Chloroplast 1544:modified Messenger 1507:Ribonucleic acids 1003:DNA Repair (Amst.) 1874: 1873: 1751:Xeno 1713:Complementary 1686:Deoxyribonucleic 1680: 1679: 1657:Small hairpin 1433: 1432: 1425:Human archaeology 1382: 1381: 945:"DNA Replication" 920:"DNA Replication" 839:Casselman, Anne. 418:natural selection 323:Okazaki fragments 169:mitochondrial DNA 117:Rosalind Franklin 88:Nuclear DNA is a 66:mitochondrial DNA 16:(Redirected from 1899: 1864: 1863: 1841:Yeast 1662:Small temporal 1592:Piwi-interacting 1520: 1519: 1516: 1497:Deoxynucleotides 1460: 1453: 1446: 1437: 1436: 1234: 1233: 1214: 1207: 1200: 1191: 1190: 1184: 1183: 1173: 1141: 1135: 1134: 1124: 1092: 1086: 1085: 1075: 1043: 1037: 1036: 1026: 994: 988: 987: 959: 953: 952: 941: 935: 934: 932: 931: 922:. Archived from 916: 910: 909: 902: 896: 895: 893: 892: 883:. Archived from 877: 871: 870: 859: 853: 852: 850: 848: 836: 830: 829: 827: 826: 817:. Archived from 811: 805: 804: 785:10.1038/290457a0 771:(5806): 457–65. 759: 753: 752: 750: 749: 740:. 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Watson 86: 35: 32: 23: 22: 15: 12: 11: 5: 1905: 1895: 1894: 1889: 1872: 1871: 1869: 1868: 1857: 1854: 1853: 1851: 1850: 1849: 1848: 1843: 1838: 1833: 1823: 1818: 1813: 1808: 1803: 1797: 1795: 1789: 1788: 1786: 1785: 1780: 1778:Peptide 1775: 1770: 1769: 1768: 1763: 1758: 1756:Glycol 1747: 1745: 1739: 1738: 1736: 1735: 1730: 1725: 1720: 1715: 1710: 1709: 1708: 1703: 1692: 1690: 1682: 1681: 1678: 1677: 1675: 1674: 1669: 1664: 1659: 1654: 1649: 1643: 1641: 1637: 1636: 1634: 1633: 1628: 1627: 1626: 1621: 1616: 1611: 1601: 1596: 1595: 1594: 1589: 1584: 1573: 1571: 1565: 1564: 1562: 1561: 1556: 1551: 1546: 1541: 1540: 1539: 1528: 1526: 1517: 1503: 1502: 1500: 1499: 1494: 1489: 1484: 1478: 1476: 1472: 1471: 1468:nucleic acids 1463: 1462: 1455: 1448: 1440: 1431: 1430: 1428: 1427: 1422: 1417: 1416: 1415: 1404: 1402: 1401:Related topics 1398: 1397: 1392: 1390: 1384: 1383: 1380: 1379: 1377: 1376: 1371: 1365: 1363: 1361:Sex chromosome 1357: 1356: 1354: 1353: 1348: 1343: 1338: 1333: 1328: 1323: 1318: 1313: 1308: 1303: 1298: 1293: 1288: 1283: 1278: 1273: 1268: 1263: 1258: 1253: 1248: 1242: 1240: 1231: 1229:Nuclear genome 1225: 1224: 1217: 1216: 1209: 1202: 1194: 1186: 1185: 1156:(11): 529–38. 1136: 1087: 1058:(2): 266–282. 1038: 1009:(7): 1087–97. 989: 970:(1–2): 12–22. 954: 936: 911: 897: 872: 854: 831: 806: 754: 725: 707: 689: 674: 673: 671: 668: 667: 666: 661: 654: 651: 650: 649: 642: 640: 633: 631: 624: 622: 615: 613: 606: 604: 597: 595: 588: 586: 579: 577: 570: 568: 561: 559: 552: 550: 543: 541: 534: 532: 525: 523: 516: 514: 507: 505: 498: 496: 489: 487: 480: 478: 471: 469: 462: 460: 453: 451: 444: 442: 435: 433: 425: 422: 389: 386: 330: 327: 305:DNA polymerase 287:polynucleotide 273: 270: 218: 215: 201: 198: 164: 161: 157:hydrogen bonds 85: 82: 33: 18:Nuclear genome 9: 6: 4: 3: 2: 1904: 1893: 1890: 1888: 1885: 1884: 1882: 1867: 1859: 1858: 1855: 1847: 1844: 1842: 1839: 1837: 1834: 1832: 1829: 1828: 1827: 1824: 1822: 1819: 1817: 1814: 1812: 1809: 1807: 1804: 1802: 1799: 1798: 1796: 1794: 1790: 1784: 1781: 1779: 1776: 1774: 1771: 1767: 1764: 1762: 1761:Threose 1759: 1757: 1754: 1753: 1752: 1749: 1748: 1746: 1744: 1740: 1734: 1731: 1729: 1726: 1724: 1721: 1719: 1718:Deoxyribozyme 1716: 1714: 1711: 1707: 1706:Mitochondrial 1704: 1702: 1699: 1698: 1697: 1694: 1693: 1691: 1689: 1683: 1673: 1670: 1668: 1665: 1663: 1660: 1658: 1655: 1653: 1650: 1648: 1645: 1644: 1642: 1638: 1632: 1629: 1625: 1622: 1620: 1617: 1615: 1612: 1610: 1607: 1606: 1605: 1602: 1600: 1597: 1593: 1590: 1588: 1585: 1583: 1580: 1579: 1578: 1575: 1574: 1572: 1570: 1566: 1560: 1557: 1555: 1552: 1550: 1547: 1545: 1542: 1538: 1535: 1534: 1533: 1530: 1529: 1527: 1525: 1524:Translational 1521: 1518: 1514: 1508: 1504: 1498: 1495: 1493: 1490: 1488: 1485: 1483: 1480: 1479: 1477: 1473: 1469: 1461: 1456: 1454: 1449: 1447: 1442: 1441: 1438: 1426: 1423: 1421: 1418: 1414: 1411: 1410: 1409: 1406: 1405: 1403: 1399: 1395: 1391: 1389: 1385: 1375: 1372: 1370: 1367: 1366: 1364: 1362: 1358: 1352: 1349: 1347: 1344: 1342: 1339: 1337: 1334: 1332: 1329: 1327: 1324: 1322: 1319: 1317: 1314: 1312: 1309: 1307: 1304: 1302: 1299: 1297: 1294: 1292: 1289: 1287: 1284: 1282: 1279: 1277: 1274: 1272: 1269: 1267: 1264: 1262: 1259: 1257: 1254: 1252: 1249: 1247: 1244: 1243: 1241: 1239: 1235: 1232: 1230: 1226: 1222: 1215: 1210: 1208: 1203: 1201: 1196: 1195: 1192: 1181: 1177: 1172: 1167: 1163: 1159: 1155: 1151: 1147: 1140: 1132: 1128: 1123: 1118: 1114: 1110: 1107:(1): 134–54. 1106: 1102: 1098: 1091: 1083: 1079: 1074: 1069: 1065: 1061: 1057: 1053: 1049: 1042: 1034: 1030: 1025: 1020: 1016: 1012: 1008: 1004: 1000: 993: 985: 981: 977: 973: 969: 965: 958: 950: 946: 940: 926:on 2013-01-28 925: 921: 915: 907: 901: 887:on 2014-07-01 886: 882: 876: 868: 864: 858: 842: 835: 821:on 2014-02-01 820: 816: 810: 802: 798: 794: 790: 786: 782: 778: 774: 770: 766: 758: 744:on 2020-11-09 743: 739: 735: 729: 721: 717: 716:"Nuclear DNA" 711: 703: 699: 693: 685: 679: 675: 665: 662: 660: 657: 656: 646: 641: 637: 632: 628: 623: 619: 614: 610: 605: 601: 596: 592: 587: 583: 578: 574: 569: 565: 560: 556: 551: 547: 542: 538: 533: 529: 524: 520: 515: 511: 506: 502: 497: 493: 488: 484: 479: 475: 470: 466: 461: 457: 452: 448: 443: 439: 434: 432: 428: 427: 421: 419: 415: 411: 407: 403: 399: 395: 385: 383: 379: 375: 371: 367: 363: 359: 355: 351: 347: 343: 339: 335: 326: 324: 319: 315: 312:assembles an 311: 306: 302: 299: 295: 290: 288: 284: 280: 269: 267: 263: 259: 255: 250: 246: 242: 240: 239:fertilization 236: 232: 231:cell division 228: 224: 217:Cell division 214: 212: 208: 197: 195: 191: 186: 182: 178: 174: 170: 160: 158: 154: 150: 146: 142: 138: 134: 130: 126: 122: 118: 114: 110: 109:Francis Crick 106: 102: 98: 95: 91: 81: 79: 78:matrilineally 75: 71: 67: 63: 59: 55: 51: 47: 43: 39: 30: 19: 1892:Cell nucleus 1836:Bacterial 1811:Lambda phage 1475:Constituents 1408:Human genome 1228: 1221:Human genome 1153: 1150:Trends Genet 1149: 1139: 1104: 1100: 1090: 1055: 1051: 1041: 1006: 1002: 992: 967: 963: 957: 948: 939: 928:. 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Res 930:2013-04-02 891:2016-07-28 867:dps.mn.gov 847:18 January 825:2014-04-23 748:2013-03-19 702:en.mimi.hu 670:References 342:DNA repair 338:Eukaryotes 314:RNA primer 101:biopolymer 1743:Analogues 1728:Hachimoji 1511:(coding, 1466:Types of 659:Chromatin 366:mutations 266:telophase 258:metaphase 200:Forensics 173:eukaryote 94:polymeric 84:Structure 48:, is the 1866:Category 1801:Phagemid 1652:Ribozyme 1238:Autosome 1180:18809224 1131:19258535 1082:25033177 1033:18458001 984:21600302 653:See also 414:germline 394:mutation 388:Mutation 356:repair, 301:helicase 262:anaphase 254:prophase 145:cytosine 1806:Plasmid 1171:5303623 1122:2650891 1073:5564444 1024:2919205 801:4355527 793:7219534 773:Bibcode 424:Gallery 310:primase 235:gametes 227:meiosis 223:mitosis 194:haploid 190:diploid 141:thymine 133:guanine 129:adenine 125:purines 1821:Fosmid 1816:Cosmid 1766:Hexose 1688:acids 1640:Others 1178:  1168:  1129:  1119:  1080:  1070:  1052:Neuron 1031:  1021:  982:  799:  791:  765:Nature 374:cancer 298:enzyme 296:. 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Index

Nuclear genome
New Decade, New Approach
DNA
cell nucleus
eukaryotic organism
genome
mitochondrial DNA
plastid DNA
Mendelian inheritance
matrilineally
nucleic acid
polymeric
biomolecule
biopolymer
double helix
Francis Crick
James D. Watson
Rosalind Franklin
nucleotides
purines
adenine
guanine
pyrimidines
thymine
cytosine
Chargaff's rules
phosphodiester bond
hydrogen bonds
mitochondrial DNA
eukaryote

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