X-DNA

X-DNA refers to the DNA carried on the X chromosome.

Females have two X chromosomes (XX) and inherit one

X from each parent. Males have one X chromosome (XY) and inherit their only X from their mother.

X-DNA is shared between mothers and children of both sexes, and between sisters. It is not passed from fathers to sons.

X-DNA testing can help uncover maternal relationships, connect with relatives on your mother's side, and provide clues about family history across generations.

Understanding X-DNA

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Mitochondrial DNA (mtDNA)