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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.
198:. 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 237:
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
314:. 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. 353:. 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 176:
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
257:. 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. 193:
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
222:. 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 405:
are most often neutral or adaptively disadvantageous. However, the small proportion of mutations that prove to be advantageous provide the genetic variation upon which
988:"Accumulation of nuclear DNA damage or neuron loss: molecular basis for a new approach to understanding selective neuronal vulnerability in neurodegenerative diseases" 202:(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). 869: 112:. Each nucleotide is composed of a five-carbon sugar, a phosphate group, and an organic base. Nucleotides are distinguished by their bases: 185:, coming only from the mother. The mutation rate for nuclear DNA is less than 0.3% while that of mitochondrial DNA is generally higher. 894: 722: 908: 803: 1446: 933: 1200: 140:
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
286: 113: 92:, found in the nucleus of eukaryotic cells. Its structure is a 50: 985: 1612: 986:
Brasnjevic I, Hof PR, Steinbusch HW, Schmitz C (July 2008).
1674: 1495: 306: 38: 397:). Mutations also arise by inaccurate DNA repair. The 241:
Like mitosis, meiosis also has distinct stages called
950: 151: 108:. Each strand is a long polymer chain of repeating 1034: 1867: 1037:"DNA damage and its links to neurodegeneration" 365:. Nuclear DNA damages are also implicated in 69:(through the mother) as in mitochondrial DNA. 1440: 1194: 1126: 1077: 1028: 979: 944: 744: 385:. A major cause of mutation is inaccurate 1454: 1447: 1433: 1201: 1187: 1035:Madabhushi R, Pan L, Tsai LH (July 2014). 830:"Identical Twins' Genes Are Not Identical" 23:DNA inside the nucleus of eukaryotic cells 1158: 1109: 1060: 1011: 172:is linear with open ends and includes 46 1132: 317: 1868: 409:operates to generate new adaptations. 1428: 1182: 827: 49:. It encodes for the majority of the 144:and the bases are held together by 61:coding for the rest. It adheres to 13: 399:microhomology-mediated end joining 351:microhomology-mediated end joining 14: 1892: 1571:Micro 1133:McVey M, Lee SE (November 2008). 1850: 1849: 1208: 852:"Forensic Science - Nuclear DNA" 675:– via The Free Dictionary. 632: 623: 614: 605: 596: 587: 578: 569: 560: 551: 542: 533: 524: 515: 506: 497: 488: 479: 470: 461: 452: 443: 434: 425: 420:Human Genome Project (1990-2003) 205: 152:Differences to mitochondrial DNA 1526:precursor, heterogenous nuclear 926: 901: 887: 104:(1953) using data collected by 1656:Trans-acting small interfering 1620:Enhancer RNAs 1538:Transfer 862: 844: 821: 796: 715: 697: 679: 665: 329:have evolved a diverse set of 260: 1: 1543:Ribosomal 1521:Messenger 658: 35:nuclear deoxyribonucleic acid 1053:10.1016/j.neuron.2014.06.034 1004:10.1016/j.dnarep.2008.03.010 270:. The replication is termed 188: 72: 7: 965:10.1016/j.mrrev.2011.05.001 723:"DNA: The Genetic Material" 641: 376: 128:, small bases that include 116:, large bases that include 10: 1897: 1722:Multicopy single-stranded 1566:Interferential 412: 381:Nuclear DNA is subject to 371:neurodegenerative diseases 347:non-homologous end joining 343:homologous recombinational 339:nucleotide excision repair 15: 1845: 1780: 1730: 1673: 1636:Guide 1628: 1556: 1511: 1494: 1463: 1389: 1375: 1348: 1225: 1216: 1151:10.1016/j.tig.2008.08.007 1090:Microbiol. Mol. Biol. Rev 200:polymerase chain reaction 1598:Small nuclear 938:highered.mcgraw-hill.com 870:"FBI — Nuclear-DNA Unit" 727:highered.mcgraw-hill.com 218:is a form of eukaryotic 18:New Decade, New Approach 1712:Genomic 1383:Human mitochondrial DNA 389:, often by specialized 1815:Artificial chromosomes 1603:Small nucleolar 395:trans-lesion synthesis 359:epigenetic alterations 41:contained within each 1608:Small Cajal Body RNAs 1102:10.1128/MMBR.00034-08 832:. Scientific American 709:thefreedictionary.com 323:Damage of nuclear DNA 318:DNA damage and repair 283:origin of replication 63:Mendelian inheritance 1661:Subgenomic messenger 1576:Small interfering 1548:Transfer-messenger 1402:Human Genome Project 1377:Mitochondrial genome 335:base excision repair 53:in eukaryotes, with 1409:List of human genes 804:"Mitochondrial DNA" 766:1981Natur.290..457A 142:phosphodiester bond 47:eukaryotic organism 1690:Chloroplast 1533:modified Messenger 1496:Ribonucleic acids 992:DNA Repair (Amst.) 1863: 1862: 1740:Xeno 1702:Complementary 1675:Deoxyribonucleic 1669: 1668: 1646:Small hairpin 1422: 1421: 1414:Human archaeology 1371: 1370: 934:"DNA Replication" 909:"DNA Replication" 828:Casselman, Anne. 407:natural selection 312:Okazaki fragments 158:mitochondrial DNA 106:Rosalind Franklin 77:Nuclear DNA is a 55:mitochondrial DNA 1888: 1853: 1852: 1830:Yeast 1651:Small temporal 1581:Piwi-interacting 1509: 1508: 1505: 1486:Deoxynucleotides 1449: 1442: 1435: 1426: 1425: 1223: 1222: 1203: 1196: 1189: 1180: 1179: 1173: 1172: 1162: 1130: 1124: 1123: 1113: 1081: 1075: 1074: 1064: 1032: 1026: 1025: 1015: 983: 977: 976: 948: 942: 941: 930: 924: 923: 921: 920: 911:. Archived from 905: 899: 898: 891: 885: 884: 882: 881: 872:. Archived from 866: 860: 859: 848: 842: 841: 839: 837: 825: 819: 818: 816: 815: 806:. Archived from 800: 794: 793: 774:10.1038/290457a0 760:(5806): 457–65. 748: 742: 741: 739: 738: 729:. Archived from 719: 713: 712: 701: 695: 694: 683: 677: 676: 669: 636: 627: 618: 609: 600: 591: 582: 573: 564: 555: 546: 537: 528: 519: 510: 501: 492: 483: 474: 465: 456: 447: 438: 429: 272:semiconservative 156:Nuclear DNA and 138:Chargaff's rules 1896: 1895: 1891: 1890: 1889: 1887: 1886: 1885: 1866: 1865: 1864: 1859: 1841: 1782:Cloning vectors 1776: 1762:Locked 1726: 1676: 1665: 1624: 1552: 1499: 1498: 1490: 1459: 1453: 1423: 1418: 1385: 1367: 1344: 1212: 1207: 1177: 1176: 1131: 1127: 1082: 1078: 1033: 1029: 984: 980: 949: 945: 932: 931: 927: 918: 916: 907: 906: 902: 893: 892: 888: 879: 877: 868: 867: 863: 850: 849: 845: 835: 833: 826: 822: 813: 811: 802: 801: 797: 749: 745: 736: 734: 721: 720: 716: 703: 702: 698: 685: 684: 680: 671: 670: 666: 661: 644: 637: 628: 619: 610: 601: 592: 583: 574: 565: 556: 547: 538: 529: 520: 511: 502: 493: 484: 475: 466: 457: 448: 439: 430: 415: 391:DNA polymerases 387:DNA replication 379: 320: 263: 208: 196:red blood cells 191: 154: 102:James D. Watson 75: 24: 21: 12: 11: 5: 1894: 1884: 1883: 1878: 1861: 1860: 1858: 1857: 1846: 1843: 1842: 1840: 1839: 1838: 1837: 1832: 1827: 1822: 1812: 1807: 1802: 1797: 1792: 1786: 1784: 1778: 1777: 1775: 1774: 1769: 1767:Peptide 1764: 1759: 1758: 1757: 1752: 1747: 1745:Glycol 1736: 1734: 1728: 1727: 1725: 1724: 1719: 1714: 1709: 1704: 1699: 1698: 1697: 1692: 1681: 1679: 1671: 1670: 1667: 1666: 1664: 1663: 1658: 1653: 1648: 1643: 1638: 1632: 1630: 1626: 1625: 1623: 1622: 1617: 1616: 1615: 1610: 1605: 1600: 1590: 1585: 1584: 1583: 1578: 1573: 1562: 1560: 1554: 1553: 1551: 1550: 1545: 1540: 1535: 1530: 1529: 1528: 1517: 1515: 1506: 1492: 1491: 1489: 1488: 1483: 1478: 1473: 1467: 1465: 1461: 1460: 1457:nucleic acids 1452: 1451: 1444: 1437: 1429: 1420: 1419: 1417: 1416: 1411: 1406: 1405: 1404: 1393: 1391: 1390:Related topics 1387: 1386: 1381: 1379: 1373: 1372: 1369: 1368: 1366: 1365: 1360: 1354: 1352: 1350:Sex chromosome 1346: 1345: 1343: 1342: 1337: 1332: 1327: 1322: 1317: 1312: 1307: 1302: 1297: 1292: 1287: 1282: 1277: 1272: 1267: 1262: 1257: 1252: 1247: 1242: 1237: 1231: 1229: 1220: 1218:Nuclear genome 1214: 1213: 1206: 1205: 1198: 1191: 1183: 1175: 1174: 1145:(11): 529–38. 1125: 1076: 1047:(2): 266–282. 1027: 998:(7): 1087–97. 978: 959:(1–2): 12–22. 943: 925: 900: 886: 861: 843: 820: 795: 743: 714: 696: 678: 663: 662: 660: 657: 656: 655: 650: 643: 640: 639: 638: 631: 629: 622: 620: 613: 611: 604: 602: 595: 593: 586: 584: 577: 575: 568: 566: 559: 557: 550: 548: 541: 539: 532: 530: 523: 521: 514: 512: 505: 503: 496: 494: 487: 485: 478: 476: 469: 467: 460: 458: 451: 449: 442: 440: 433: 431: 424: 422: 414: 411: 378: 375: 319: 316: 294:DNA polymerase 276:polynucleotide 262: 259: 207: 204: 190: 187: 153: 150: 146:hydrogen bonds 74: 71: 22: 9: 6: 4: 3: 2: 1893: 1882: 1879: 1877: 1874: 1873: 1871: 1856: 1848: 1847: 1844: 1836: 1833: 1831: 1828: 1826: 1823: 1821: 1818: 1817: 1816: 1813: 1811: 1808: 1806: 1803: 1801: 1798: 1796: 1793: 1791: 1788: 1787: 1785: 1783: 1779: 1773: 1770: 1768: 1765: 1763: 1760: 1756: 1753: 1751: 1750:Threose 1748: 1746: 1743: 1742: 1741: 1738: 1737: 1735: 1733: 1729: 1723: 1720: 1718: 1715: 1713: 1710: 1708: 1707:Deoxyribozyme 1705: 1703: 1700: 1696: 1695:Mitochondrial 1693: 1691: 1688: 1687: 1686: 1683: 1682: 1680: 1678: 1672: 1662: 1659: 1657: 1654: 1652: 1649: 1647: 1644: 1642: 1639: 1637: 1634: 1633: 1631: 1627: 1621: 1618: 1614: 1611: 1609: 1606: 1604: 1601: 1599: 1596: 1595: 1594: 1591: 1589: 1586: 1582: 1579: 1577: 1574: 1572: 1569: 1568: 1567: 1564: 1563: 1561: 1559: 1555: 1549: 1546: 1544: 1541: 1539: 1536: 1534: 1531: 1527: 1524: 1523: 1522: 1519: 1518: 1516: 1514: 1513:Translational 1510: 1507: 1503: 1497: 1493: 1487: 1484: 1482: 1479: 1477: 1474: 1472: 1469: 1468: 1466: 1462: 1458: 1450: 1445: 1443: 1438: 1436: 1431: 1430: 1427: 1415: 1412: 1410: 1407: 1403: 1400: 1399: 1398: 1395: 1394: 1392: 1388: 1384: 1380: 1378: 1374: 1364: 1361: 1359: 1356: 1355: 1353: 1351: 1347: 1341: 1338: 1336: 1333: 1331: 1328: 1326: 1323: 1321: 1318: 1316: 1313: 1311: 1308: 1306: 1303: 1301: 1298: 1296: 1293: 1291: 1288: 1286: 1283: 1281: 1278: 1276: 1273: 1271: 1268: 1266: 1263: 1261: 1258: 1256: 1253: 1251: 1248: 1246: 1243: 1241: 1238: 1236: 1233: 1232: 1230: 1228: 1224: 1221: 1219: 1215: 1211: 1204: 1199: 1197: 1192: 1190: 1185: 1184: 1181: 1170: 1166: 1161: 1156: 1152: 1148: 1144: 1140: 1136: 1129: 1121: 1117: 1112: 1107: 1103: 1099: 1096:(1): 134–54. 1095: 1091: 1087: 1080: 1072: 1068: 1063: 1058: 1054: 1050: 1046: 1042: 1038: 1031: 1023: 1019: 1014: 1009: 1005: 1001: 997: 993: 989: 982: 974: 970: 966: 962: 958: 954: 947: 939: 935: 929: 915:on 2013-01-28 914: 910: 904: 896: 890: 876:on 2014-07-01 875: 871: 865: 857: 853: 847: 831: 824: 810:on 2014-02-01 809: 805: 799: 791: 787: 783: 779: 775: 771: 767: 763: 759: 755: 747: 733:on 2020-11-09 732: 728: 724: 718: 710: 706: 705:"Nuclear DNA" 700: 692: 688: 682: 674: 668: 664: 654: 651: 649: 646: 645: 635: 630: 626: 621: 617: 612: 608: 603: 599: 594: 590: 585: 581: 576: 572: 567: 563: 558: 554: 549: 545: 540: 536: 531: 527: 522: 518: 513: 509: 504: 500: 495: 491: 486: 482: 477: 473: 468: 464: 459: 455: 450: 446: 441: 437: 432: 428: 423: 421: 417: 416: 410: 408: 404: 400: 396: 392: 388: 384: 374: 372: 368: 364: 360: 356: 352: 348: 344: 340: 336: 332: 328: 324: 315: 313: 308: 304: 301:assembles an 300: 295: 291: 288: 284: 279: 277: 273: 269: 258: 256: 252: 248: 244: 239: 235: 231: 229: 228:fertilization 225: 221: 220:cell division 217: 213: 206:Cell division 203: 201: 197: 186: 184: 180: 175: 171: 167: 163: 159: 149: 147: 143: 139: 135: 131: 127: 123: 119: 115: 111: 107: 103: 99: 98:Francis Crick 95: 91: 87: 84: 80: 70: 68: 67:matrilineally 64: 60: 56: 52: 48: 44: 40: 36: 32: 28: 19: 1881:Cell nucleus 1825:Bacterial 1800:Lambda phage 1464:Constituents 1397:Human genome 1217: 1210:Human genome 1142: 1139:Trends Genet 1138: 1128: 1093: 1089: 1079: 1044: 1040: 1030: 995: 991: 981: 956: 952: 946: 937: 928: 917:. 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Res 919:2013-04-02 880:2016-07-28 856:dps.mn.gov 836:18 January 814:2014-04-23 737:2013-03-19 691:en.mimi.hu 659:References 331:DNA repair 327:Eukaryotes 303:RNA primer 90:biopolymer 1732:Analogues 1717:Hachimoji 1500:(coding, 1455:Types of 648:Chromatin 355:mutations 255:telophase 247:metaphase 189:Forensics 162:eukaryote 83:polymeric 73:Structure 37:, is the 1855:Category 1790:Phagemid 1641:Ribozyme 1227:Autosome 1169:18809224 1120:19258535 1071:25033177 1022:18458001 973:21600302 642:See also 403:germline 383:mutation 377:Mutation 345:repair, 290:helicase 251:anaphase 243:prophase 134:cytosine 1795:Plasmid 1160:5303623 1111:2650891 1062:5564444 1013:2919205 790:4355527 782:7219534 762:Bibcode 413:Gallery 299:primase 224:gametes 216:meiosis 212:mitosis 183:haploid 179:diploid 130:thymine 122:guanine 118:adenine 114:purines 1810:Fosmid 1805:Cosmid 1755:Hexose 1677:acids 1629:Others 1167:  1157:  1118:  1108:  1069:  1059:  1041:Neuron 1020:  1010:  971:  788:  780:  754:Nature 363:cancer 287:enzyme 285:. 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Index

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
mitochondria

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