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DNA can help police track down criminals if an attacker leaves something like hair or blood at a crime scene. Everybody’s DNA is unique unless they are identical twins, and the genetic ‘fingerprint’ of this material can be enough to confirm if a suspect was at the scene.

DNA can help police track down criminals if an attacker leaves something like hair or blood at a crime scene. Everybody’s DNA is unique unless they are identical twins, and the genetic ‘fingerprint’ of this material can be enough to confirm if a suspect was at the scene.

Genetic fingerprinting can also show if somebody is closely related to somebody else. Archaeologists used samples from living relatives to identify whether bodies found buried in a forest in [[Russia]] were the remains of the [[Tsar]] and his family, killed during the 1919 [[Russian revolution]].

Genetic fingerprinting can also show if somebody is closely related to somebody else. Archaeologists used samples from living relatives to identify whether bodies found buried in a forest in [[Russia]] were the remains of the [[tsar]] and his family, killed during the 1919 [[Russian Revolution]].

As well as showing how different we all are, DNA shows how much we are all the same. Only one small part of one chromosome distinguishes a boy from a girl. Genes give us different colored eyes, hair and skin, but 99.5% of any human's DNA is in the same order as everybody else’s.  

As well as showing how different we all are, DNA shows how much we are all the same. Only one small part of one chromosome distinguishes a boy from a girl. Genes give us different colored [[eye]]s, [[hair]] and [[skin]], but 99.5% of any human's DNA is in the same order as everybody else’s.  

Human DNA is made up of the same components as the DNA of other organisms, most species even share the same genes which code for the same proteins. This is why even fruit flies and mice can be used as model organisms in order to help better understand human genetic diseases.

Human DNA is made up of the same components as the DNA of other organisms, with most species even sharing the same genes which code for the same proteins. This is why even [[fruit fly|fruit flies]] and [[mouse|mice]] can be used as model organisms in order to help better understand human genetic diseases.

==External links==

==External links==