Genomic DNA

Genomic DNA is the DNA that makes up the genome of an organism. It includes both the DNA in the nucleus (nuclear DNA) and the DNA in mitochondria (mitochondrial DNA). Genomic DNA is used in a variety of applications in genetics, including sequencing genomes, studying mutations, and genetic fingerprinting.

Overview

Genomic DNA is the complete set of genetic material within an organism. This DNA is packaged into chromosomes within the nucleus of each cell. In addition to the nuclear DNA, cells also contain a small amount of DNA within the mitochondria. This mitochondrial DNA is inherited solely from the mother and can provide information about maternal ancestry.

Sequencing

DNA sequencing is the process of determining the precise order of nucleotides within a DNA molecule. It includes any method or technology that is used to determine the order of the four bases: adenine, guanine, cytosine, and thymine. The advent of rapid DNA sequencing methods has greatly accelerated biological and medical research and discovery.

Mutations

A mutation is a change in the DNA sequence. Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses. Some mutations are beneficial, some are neutral, and some are harmful.

Genetic Fingerprinting

Genetic fingerprinting is a method used to identify individuals by their DNA profiles. This technique is used in forensic science to help identify suspects or victims in a criminal investigation. It can also be used in paternity testing to establish if an individual is the biological parent of a child.

See Also

• DNA
• Chromosome
• Mitochondria
• DNA sequencing
• Mutation
• Genetic fingerprinting

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