DNA analysis has helped exonerate people wrongly accused of crimes in one third of cases and freed prisoners wrongly accused of rape or murder. It is also used to establish paternity and identify remains after disasters. DNA is composed of four bases - adenine, guanine, thymine and cytosine - and is found packaged into chromosomes in the nucleus of cells, where it provides the instructions to make proteins through DNA sequences.

1. Medical
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Deoxyribonucleic Acid
(DNA)

2. ●
Identification of specimens using DNA has
had other benefits, in one third of the cases
where this technique has been used, DNA
analysis has been able to exonerate people
wrongly accused of crimes.
Prisoners wrongly accused of rape or murder
have been freed on basis of DNA evidence.
●
DNA analysis is now a common tool for
establishing paternity, and it has been called
on to identify remains after tragedies such as
airline accidents and the inferno at the
Branch Davidian complex in Waco, Texas.

3. Features of DNA that
are Important for
Analysis
DNA is composed of four different chemical
building blocks called "bases". These four
bases are:
Adenine
Guanine
Thymine
Cytosine

4. DNA Structure

5. DNA
within the chromosomes

6. Techniques used for DNA

7. Where is DNA Found?
In organisms called eukaryotes, DNA is found
inside a special area of the cell called the
nucleus. Because the cell is very small, and
because organisms have many DNA molecules
per cell, each DNA molecule must be tightly
packaged. This packaged form of the DNA is
called a chromosome.

8. What is DNA made of?
DNA is made of chemical building blocks called
nucleotides.

9. DNA Sequences used to make
Proteins

10. Medical
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