The U.S. Constitutionâs 10th Amendment is arguably the most important of all the amendments in the brilliant document that helped shape the United States.
Not even identical twins have the same DNA--although theirs would be far closer than anyone else's. DNA changes over time. Odds of two siblings having the same DNA who did not split from the same zygote are vanishingly small.
Odds of two siblings having the same DNA who did not split from the same zygote are vanishingly small. If the current population of the earth was your sister, it is unlikely another person would have DNA close enough to yours they could be mistaken for your identical twin.