An actual fingerprint is a mark left by the friction ridges of the palmar skin of a human (or primate). This is a very important research tool for forensic science.
A DNA fingerprint is a technic that helps identify individuals based on their DNA profiles. Although most of the human DNA sequences are common in most of the humans, there are several that can vary substantially from individual to individual - called variable number tandem repeats. As they vary so much from individual to individual, by comparison of the testing DNA with the DNA of any individual, it is easy to relate whether both sequences are correspondent to each other.
Taking action is the last step
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Bro I know times get tuff dude I've been there so many times and it sucks bro but just know it gets better dude trust me no matter how hard it gets it will get better. I once got cheated on and it sucks but you will find someone you truly love. and like a week after that my grandpa does then a month later my Uncle died bro it sucks but trust me if you are thinking no one cares about you people care I almost took my own life before but I promise it will get better and just so you no bro I'm here if you need someone to talk to.