Examines genes that a father passes on to a son via DNA. Examination of the Y chromosome. These are used by the FBI in their genetic analysis database.
A Y chromosome DNA test, also known as a Y-DNA test, is a genealogical DNA test used to research a man's patrilineal lineage, also known as his his father's line. Similar to patrilineal surnames, the Y chromosome is almost entirely unaltered from father to son. The most recent common ancestor, or MRCA, shared by two people can be inferred from mutations that occasionally arise as a result of errors in the copying process. They are connected within a genealogical time range if their test results are an exact or nearly exact match. Then each individual may view the father-line details of the other, which are normally the names of each patrilineal ancestor and his spouse, together with the dates and locations of their marriage and the births and deaths of both spouses. The two individuals who are matched may discover a common ancestor, or MRCA, as well as any knowledge that the other may already have about their shared patriline, or father's line, before the MRCA. A surname DNA project often coordinates Y-DNA testing. Additionally, if both parties agreed, each would get the other's contact details.Women can ask their father, brother, paternal uncle, paternal grandpa, or a cousin who has the same surname lineage (the same Y-DNA) to take a test for them in order to find out their direct paternal DNA heritage.
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