N. Harmonik

If a person's DNA changes over time, how can it be reliably used to identify a missing person or criminal after years or even decades have passed?


7 Answers

Ray  Dart Profile
Ray Dart answered

DNA does not change over time. Some diseases (the big C) will damage samples of DNA taken from affected parts of the body (and even then, not by much).

PJ Stein Profile
PJ Stein answered

I don't know where you got DNA changes, but it doesn't.  Even transexual people who go through surgery and take hormones to appear to be of the opposite sex they were born still have the DNA that says they were their original sex.

mohammad mahmoudi Profile

DNA can't change over time that much .it does change but it keeps the main data that it can be identified who we are

Taila Nevado Profile
Taila Nevado answered

I read this question and I thought, I was not aware that DNA
can change. So I looked it up and from what I have understood, despite the fact
that mutation occurs in some cases, it does not change so much that it will be useless
in identifying a missing person.

Darren Wolfgang Profile
Darren Wolfgang answered

While our bodies age, scientists believe that our DNA at least remains constant. New research, however, reveals that, even though its sequence remains constant, subtle chemical changes occur to our DNA as we age—and it could explain why the risk of developing disease increases as we get older.


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