|
|
Article: DNA
- Article from:
- Encyclopedia of Espionage, Intelligence, andSecurity
- Author:
CopyrightCOPYRIGHT 2004 The Gale Group Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
DNA
█
JULI BERWALD
Because of the uniqueness of every human's DNA and the ubiquity of DNA in cells, this genetic molecule has become an important tool for the identification of individuals, both in forensics and security applications. Deoxyribonucleic acid (DNA) consists of two twisted strands of polymers, made up of mononucleotide units. Each nucleotide is composed of three separate parts: a 2-deoxyribose sugar ("2-deoxy-" because the hydroxyl or -OH group of the ribose sugar is missing from the second carbon position on the sugar ring), a phosphate, and one of the four bases: adenine (A), guanine (G), cytosine (C), thymine (T). The deoxyribose sugar and phosphate are ...
Related newspaper, magazine, and journal articles:
|
|
Article: Nature-Nurture Controversy
Gale Encyclopedia of Psychology;
700+ words
... ... extremely difficult to measure is the fact that human sperm and eggs, which are produced by cell division, have 23 unpaired chromosomes. This means that one half of a person's genes comes from the mother, and the other half from the father ...
|
|