Your earliest known ancestor is the furthest person who you have documented on a specific genealogical line. In genetic genealogy, it usually refers to someone on a direct maternal line (the mother, her mother, her mother's mother, [...]

Exogamy is marriage outside of a cultural or population group.

An exact match is when two people have exactly the same results for all markers or regions compared.

A protein that facilitates a specific chemical reaction by working as a catalyst.

An endogamous population is one where the members usually only marry within the population group. The bases for endogamy may be geography, ethnic identity, social class, or religion. Long periods of intermarriage have left many [...]