DNA molecule & sequences. Computer artwork of an autoradiogram of DNA (deoxyribonucleic acid) sequences. A close up view of a sequence is superimposed in the foreground. In the background is part of a strand of DNA with its various atoms depicted as white spheres. Here the DNA sequence is four rows of irregularly spaced black bands. A DNA sample can be taken from body fluids such as blood, and body tissues. The DNA is then fragmented with enzymes to form the banding pattern. The bands represent the positioning of the base pairs on the DNA molecule. This banding makes up the genetic code in the form of genes which is unique to every person.
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