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Finding a Match

The DNA Connection

One of the most exciting advances in genealogical research is the use of DNA.

Just as scientists proved that the descendants of slave Sally Hemings had also descended from Thomas Jefferson or a close male relation of his, you can compare your chromosomes to those of other folks to whom you may be related. Every man's cheek swab contains a Y chromosome identical to his father's—and his father before him. And anyone's sample contains mitochondrial DNA passed intact from his or her mother. Any two people whose Y chromosomes or mitochondrial DNA match have a forebear in common. … Back to Article

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