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DNA TEST - DNA (DeoxyriboNucleic Acid) molecules contain hereditary (genetic) information
which theory on DNA testing is based consists of the following: all cells in the biological instructions
(included white blood cells and muscles) contain DNA; the structure of the DNA is really a code of a
person is identical throughout a person's body; DNA Each gene is a code for a particular protein. Our
bodies are made up of proteins. So the genes dictate how we are made and what our bodies look like.
DNA is made of chemical building blocks called nucleotides. These building blocks are made of three
parts: a phosphate group, a sugar group and one of four types of nitrogen bases (adenine (A), thymine
(T), guanine (G) and cytosine (C)). To form a strand of DNA, nucleotides are linked into chains, with
the phosphate and sugar groups alternating.
DNA structure is constant from a person's infancy through their death; and, finally, that no two people
(except identical twins) have the same DNA. DNA can be extracted from blood (white blood cells and
plasma), skin, tissue, sperm, saliva, vaginal swabs, mouth scrapings, bones and hair. The technique is
widely accepted as scientifically reliable.
** DNA is a body chemical that everyone has. Scientific evidence used in criminal cases and in
paternity suits. States are increasingly requiring mandatory submission of blood samples from certain
convicted persons for DNA identification and placement in an information bank that can then be used in
the event that future crimes are committed. By reviewing the DNA information of the people in the
case, the court can decide whether the man named in the court papers is actually the child's father.
Paternity Test the scientists figured out the double helix structure of DNA - a structure that enables it
to carry biological information from one generation to the next. DNA molecules are shaped in a 'double
helix'. They are two long strands coiled round each other to inherit half DNA from female and half from
male. Scientific means by which the identity of a person's (usually a child) father is established,
includes blood grouping and genetic tests. Once paternity is established, the child has a right to
receive support and inherit from the real father.

"Courtesy: National Human Genome Research Institute."visit related website >

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