DNA sequence
DNA Sequence
A DNA sequence (pronounced: dee-en-ay see-kwens) is a specific order of nucleotides along a DNA molecule that determines the genetic information. The DNA sequence is composed of four types of nucleotides: adenine (A), thymine (T), guanine (G), and cytosine (C).
Etymology
The term "DNA sequence" is derived from the English words "deoxyribonucleic acid" and "sequence". "Deoxyribonucleic acid" is the full name of DNA, and "sequence" refers to the order in which things are arranged.
Related Terms
- Genome: The complete set of genes or genetic material present in a cell or organism.
- Gene: A distinct sequence of nucleotides forming part of a chromosome, the order of which determines the order of monomers in a polypeptide or nucleic acid molecule which a cell (or virus) may synthesize.
- Nucleotide: The basic building blocks of nucleic acids such as DNA and RNA.
- Base Pair: Two chemical bases bonded to one another forming a "rung of the DNA ladder."
- Genetic Code: The set of rules by which information encoded in genetic material (DNA or RNA sequences) is translated into proteins by living cells.
See Also
- DNA Sequencing: The process of determining the precise order of nucleotides within a DNA molecule.
- Genetic Variation: The difference in DNA sequences between individuals within a population.
- Mutation: A change in the DNA sequence of a gene or chromosome of an organism that may alter the trait or characteristic that the gene controls.
External links
- Medical encyclopedia article on DNA sequence
- Wikipedia's article - DNA sequence
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