Deletion
Deletion (medical term)
Deletion (pronunciation: /dɪˈliːʃən/) is a term used in genetics to describe a mutation where a part of a chromosome or a sequence of DNA is left out during DNA replication. This can lead to diseases and conditions that are caused by an abnormal number of genes or chromosomes.
Etymology
The term "deletion" comes from the Latin word deletio, meaning "a blotting out or erasing". In the context of genetics, it refers to the removal or "erasing" of a segment of genetic material.
Related Terms
- Mutation: A change in the DNA sequence that makes up a gene.
- Chromosome: A thread-like structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.
- DNA: Deoxyribonucleic acid, a self-replicating material present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.
- Genome: The complete set of genes or genetic material present in a cell or organism.
- Genetic Disorder: A disease caused by abnormalities in an individual's genome.
See Also
- Insertion (genetics): A type of mutation involving the addition of genetic material.
- Inversion (genetics): A chromosome rearrangement in which a segment of a chromosome is reversed end to end.
- Duplication (genetics): A mutation that involves duplication of a region of DNA on a chromosome.
External links
- Medical encyclopedia article on Deletion
- Wikipedia's article - Deletion
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