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Family Tree

It has been suggested family Tree Ahnentafel be merged into this article. Family tree showing the relationship of each person to the orange person, including cousins and gene share.

A family tree, or pedigree chart, is a chart representing family relationships in a conventional tree structure. The more detailed family trees used in medicine and social work are known as genograms. Family trees are often presented with the oldest generations at the top and the newer generations at the bottom. An ancestry chart, which is a tree showing the ancestors of an individual, will more closely resemble a tree in shape, being wider at the top than the bottom. In some ancestry charts, an individual appears on the left and his or her ancestors appear to the right. A descendancy chart, which depicts all the descendants of an individual will be narrowest at the top.

Family trees can have many themes. One might encompass all direct descendants of a single figure, or all known ancestors of a living person. Yet another approach is to construct a tree including all holders of a certain office, such as kings of Germany. Fan charts depict paternal and maternal ancestors. While family trees are depicted as trees, family relations do not in general form a tree in the sense of graph theory, since distant relatives can mate, so a person can have a common ancestor on their mother’s and father’s side. A descendancy chart, on the other hand, does not in general have a regular structure, as a person can have any number of children, or none at all. In Japan, the ancestry of the Imperial Family is traced back to the mythological origins of Japan.

The connection to persons from the established historical record begins in the mid-first millennium AD. In the Tora and Old Testament, genealogies are provided for many biblical persons, including a record of the descendants of Adam. In the Jewish faith, the Kohanim are claimed to descend from Aaron, and many share common Y-chromosome origins, but the genealogy of this is not reliably recorded back to that era. In the Islamic world, claimed descent from the prophet Mohammed greatly enhanced the status of political and religious leaders.

Posted in Master Tape.