X chromosome

Human X chromosome
Human X chromosome (after G-banding)
X chromosome in human male karyogram
Features
Length (bp)154,259,566 bp
(CHM13)
No. of genes804 (CCDS)
TypeAllosome
Centromere positionSubmetacentric[1]
(61.0 Mbp)[2]
Complete gene lists
CCDSGene list
HGNCGene list
UniProtGene list
NCBIGene list
External map viewers
EnsemblChromosome X
EntrezChromosome X
NCBIChromosome X
UCSCChromosome X
Full DNA sequences
RefSeqNC_000023 (FASTA)
GenBankCM000685 (FASTA)

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.[3]

  1. ^ Tom Strachan; Andrew Read (2 April 2010). Human Molecular Genetics. Garland Science. p. 45. ISBN 978-1-136-84407-2.
  2. ^ Genome Decoration Page, NCBI. Ideogram data for Homo sapience (850 bphs, Assembly GRCh38.p3). Last update 2014-06-03. Retrieved 2017-04-26.
  3. ^ Angier, Natalie (2007-05-01). "For Motherly X Chromosome, Gender Is Only the Beginning". The New York Times. Retrieved 2007-05-01.