File:Human_male_karyotpe_high_resolution_-_Chromosome_X.png · Wikimedia Commons · See Wikimedia Commons
X chromosome
Sign in to saveAlso known as GO:0000805, chrX, X, X chromosomes
sex chromosome present in both sexes, of species in which the male is the heterogametic sex
Key facts
- Length bp
- 154,259,566 bp, (CHM13)
- Number span no of genes
- 804 ( CCDS )
- Type
- Allosome
- Centromere position
- Submetacentric , (61.0 Mbp)
- Ccds
- Gene list
- Hgnc
- Gene list
- Uniprot
- Gene list
- Ncbi
- Gene list
- Ensembl
- Chromosome X
- Entrez
- Chromosome X
- Ucsc
- Chromosome X
- Refseq
- NC_000023 ( FASTA )
- Genbank
- CM000685 ( FASTA )
via Wikipedia infobox
Research
36,067 papers- X chromosome inactivation in mammals: general principles and species-specific considerations.EMBO reports · 2025
- X-chromosome inactivation and escape.Journal of genetics · 2015
- X-chromosome inactivation.Current biology : CB · 1999
- Mechanisms of Choice in X-Chromosome Inactivation.Cells · 2022
- Multifaceted role of CTCF in X-chromosome inactivation.Chromosoma · 2024
via PubMed
Wikidata facts
- Subclass of
- sex chromosome
- Part of
- genome
Show 3 more facts
- Commons category
- X chromosomes
- exact match
- purl.obolibrary.org/obo/GO_0000805
- different from
- X
Sources (2)
via Wikidata · CC0
~19 min read
Encyclopedic overview
The X chromosome is one of the two sex chromosomes in many organisms, including mammals, and is found in both males and females. It is a part of the XY sex-determination system and XO sex-determination system. The X chromosome was named for its unique properties by early researchers, which resulted in the naming of its counterpart Y chromosome, for the next letter in the alphabet, following its subsequent discovery.
Discovery
Excerpted from Wikipedia’s “X chromosome” article, available under the CC BY-SA 4.0 licence.