Dan Vergano
Science Reporter
November 25, 2022
How can a paternity test suggest a mother is also her daughter’s father?
The answer to that medical mystery, sparked by a confusing paternity test result, is “When the genes of a vanished twin brother live on in the mother’s DNA.” The finding, which genetics experts reported earlier this month, suggests that such human “chimeras” — people with DNA from more than one embryo — could be more common than we thought.
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