Changes

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.  

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, 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.

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]], [[mouse|mice]], or [[chimpanzee|chimpanzees]] can be used as model organisms in order to help better understand human genetic diseases.

==External links==

==External links==