Family Tree

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, genealogy, and social work are known as genograms.

Genealogical data can be represented in several formats, for example as a pedigree or ancestor chart. 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. Another might include all members of a particular surname (e.g. male-line descendants). Yet another approach is to construct a tree including all holders of a certain office, such as kings of Germany. This relies on dynastic marriage to hold together the links between dynasties.

Family Tree DNA

Projects create opportunities for people to work with others to explore their common genetic heritage. Family Tree DNA encourages customers' participation in projects. Membership is free and voluntary. Members may join or leave a project at any time.

Family Tree DNA Projects are run by unpaid volunteers who have an interest in the history and genealogy of a particular haplogroup, lineage, geographic region, ethnic group, or surname. They are given access to tools to compare results and are responsible for managing and organizing the data for their projects.