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.
Best Answer: No one has the same DNA, unless you are identical twins. However brothers and sisters share a certain amount of DNA based on there parents. If they had the same DNA they would look exactly the same.