Marker chromosome
Marker Chromosome
A Marker Chromosome (pronunciation: /ˈmɑːrkər ˈkroʊməˌsoʊm/) is an abnormal chromosome that is unidentifiable in relation to the standard set of chromosomes. It is an extra piece of chromosome that has a distinctive banding pattern but cannot be identified or matched with any of the normal 46 chromosomes in humans.
Etymology
The term "Marker Chromosome" is derived from the English words "marker" and "chromosome". The term "marker" is used in the sense of a distinguishing trait, while "chromosome" is a term in genetics referring to a thread-like structure of nucleic acids and protein that carries genetic information.
Related Terms
- 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.
- Genetics: The study of heredity and the variation of inherited characteristics.
- Nucleic Acids: Complex organic substances present in living cells, especially DNA or RNA, whose molecules consist of many nucleotides linked in a long chain.
- Protein: A large molecule composed of one or more chains of amino acids in a specific order; the order is determined by the base sequence of nucleotides in the gene that codes for the protein.
- Gene: A unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring.
See Also
External links
- Medical encyclopedia article on Marker chromosome
- Wikipedia's article - Marker chromosome
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