Editing Genealogy (section)

===Genetic analysis===
{{Main|Genetic genealogy}}
[[File:D1S80Demo.png|left|thumb|Variations of [[VNTR]] allele lengths in six individuals]]
Because a person's [[DNA]] contains information that has been passed down relatively unchanged from early ancestors, [[Genetic fingerprinting|analysis of DNA]] is sometimes used for genealogical research. Three DNA types are of particular interest. [[Mitochondrial DNA]] (mtDNA) is contained in the mitochondria of the egg cell and is passed down from a mother to all of her children, both male and female; however, only females pass it on to their children. [[Y-chromosome|Y-DNA]] is present only in males and is passed down from a father to his sons (direct male line) with only minor mutations occurring over time. [[Autosomal DNA]] (atDNA), is found in the 22 non-sex chromosomes (autosomes) and is inherited from both parents; thus, it can uncover relatives from any branch of the family. A [[genealogical DNA test]] allows two individuals to find the probability that they are, or are not, related within an estimated number of generations. Individual [[Genealogical DNA test|genetic test results]] are collected in databases to match people descended from a relatively recent common ancestor. See, for example, the [[Molecular Genealogy Research Project]]. Some tests are limited to either the patrilineal or the matrilineal line.<ref>CeCe Moore, "The History of Genetic Genealogy and Unknown Parentage Research: An Insider's View." ''Journal of Genetic Genealogy'' 8.1 (2016): 35–37.</ref>