Ahnentafel numbers of ancestors who could contribute a segment on the X chromosome. When generating a list from a genealogy program, females start with themselves. Males start with their mothers to use the numbers below, or use the diagram http://www.thegeneticgenealogist.com/2009/01/12/more-x-chromosome-charts/ Generation 1 2 3 Generation 2 5 6 7 Generation 3 10 11 13 14 15 Generation 4 21 22 23 26 27 29 30 31 Generation 5 42 43 45 46 47 53 54 55 58 59 61 62 63 Generation 6 85 86 87 90 91 93 94 95 106 107 109 110 111 117 118 119 122 123 125 126 127 Generation 7 170 171 173 174 175 181 182 183 186 187 189 190 191 213 214 215 218 219 221 222 223 234 235 237 238 239 245 246 247 250 251 253 254 255 Generation 8 341 342 343 346 347 349 350 351 362 363 365 366 367 373 374 375 378 379 381 382 383 426 427 429 430 431 437 438 439 442 443 445 446 447 469 470 471 474 475 477 478 479 490 491 493 494 495 501 502 503 506 507 509 510 511 Generation 9 682 683 685 686 687 693 694 695 698 699 701 702 703 725 726 727 730 731 733 734 735 746 747 749 750 751 757 758 759 762 763 765 766 767 853 854 855 858 859 861 862 863 874 875 877 878 879 885 886 887 890 891 893 894 895 938 939 941 942 943 949 950 951 954 955 957 958 959 981 982 983 986 987 989 990 991 1002 1003 1005 1006 1007 1013 1014 1015 1018 1019 1021 1022 1023 Generation 10 1365 1366 1367 1370 1371 1373 1374 1375 1386 1387 1389 1390 1391 1397 1398 1399 1402 1403 1405 1406 1407 1450 1451 1453 1454 1455 1461 1462 1463 1466 1467 1469 1470 1471 1493 1494 1495 1498 1499 1501 1502 1503 1514 1515 1517 1518 1519 1525 1526 1527 1530 1531 1533 1534 1535 1706 1707 1709 1710 1711 1717 1718 1719 1722 1723 1725 1726 1727 1749 1750 1751 1754 1755 1757 1758 1759 1770 1771 1773 1774 1775 1781 1782 1783 1786 1787 1789 1790 1791 1877 1878 1879 1882 1883 1885 1886 1887 1898 1899 1901 1902 1903 1909 1910 1911 1914 1915 1917 1918 1919 1962 1963 1965 1966 1967 1973 1974 1975 1978 1979 1981 1982 1983 2005 2006 2007 2010 2011 2013 2014 2015 2026 2027 2029 2030 2031 2037 2038 2039 2042 2043 2045 2046 2047