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.
Judith McCann. answered on 15 Jun 2011: No,Two people can have similar DNA if they are closely related (brothers/sisters) but they will never be exactly the same unless the two people are identical twins. Everyoneâs DNA is a contribution from both parents, and your parents DNA is a contribution from both grandparents.