Chromosome 9
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Chromosome 9
Chromosome 9 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 9 spans about 138 million base pairs (the building material of DNA) and represents between 4.5 and 5.0 percent of the total DNA in cells.
Pronunciation
Chromosome 9 is pronounced as "kroh-muh-sohm nain".
Etymology
The term "chromosome" comes from the Greek words "chroma" or color and "soma" or body. The number 9 denotes its position in the human genome sequence.
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.
- 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.
- Base pair: A pair of complementary bases in a double-stranded nucleic acid molecule, consisting of a purine in one strand linked by hydrogen bonds to a pyrimidine in the other.
Diseases and disorders
Several diseases and disorders are related to Chromosome 9, including Friedreich's ataxia, Ehlers-Danlos syndrome, and Charcot-Marie-Tooth disease.
See also
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