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human chromosome 21

human chromosome
Class type of: autosome, acrocentric chromosome Q753218

Facts

9 properties
Instance of
chromosome
Follows
human chromosome 20[2]
Followed by
human chromosome 22[3]
Subclass of
autosome, acrocentric chromosome[4][5]
Part of
human genome[6]
Short name
21[8]
Found in taxon
Homo sapiens[7]
Genetic association
Down syndrome[10]
Length
+46709983[9]
🏷️ Also known as
en Homo sapiens chromosome 21 en chr21 en human chromosome 21 ar صبغي 21 ar كروموسوم 21 (إنسان) cs chromozom 21 da kromosom 21 de Chromosom 21 des Menschen de Chromosom 21 de 21. Chromosom es Cromosoma 21 es chr21 fa کروموزوم ۲۱ fi kromosomi 21 fr chromosome 21 humain he כרומוזום 21 hu humán 21-es kromoszóma id kromosom 21 manusia ja 21番染色体 (ヒト) ja 第21染色体
🔖 Identifiers · 12
Library of Congress Authorities ID
sh85062848
OpenAlex ID
C137555145
Encyclopædia Britannica Online ID
science/chromosome-21
Freebase ID
/m/08qwvm
J9U entity ID
987007531206505171
MeSH descriptor ID
D002891
MeSH tree code
A11.284.187.520.300.505.510, G05.360.162.520.300.505.510
Microsoft Academic ID (discontinued)
137555145
RefSeq genome ID
NC_000021.9
UMLS CUI
C0008664
Wellcome Collection concept ID
teuuh6te
Yale LUX ID
concept/f14d4f5d-c188-49cd-8558-0f6071d1db63

Report an error or request removal Lineage (PROV-JSON)

🔗 Connections
← Chromosome 69
Down syndrome, TMPRSS2, SOD1, DNMT3L, OLIG2, CCT8, CLIC6, ERG +61 more
Subclass of 2
autosome, acrocentric chromosome
Belongs to 1
human genome
Followed by 1
human chromosome 22
Followed by (predecessor) 1
human chromosome 22
Follows 1
human chromosome 20
Found in taxon 1
Homo sapiens
Genetic association 1
Down syndrome
Instance of 1
chromosome
Part of 1
human genome
Preceded by (successor) 1
human chromosome 20
← Category combines topics 1
Category:Genes on human chromosome 21
← Genetic association 1
Down syndrome
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Summary

human chromosome 21 is a chromosome[1].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . Methods of Studying Human Chromosomes and Nomenclature. The Normal Human Karyotype. wikidata.org.
  5. [6] ↑ . wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . wikidata.org.
  8. [9] ↑ . ncbi.nlm.nih.gov. Retrieved . ncbi.nlm.nih.gov. Provenance: wikidata.org.
  9. [10] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). human chromosome 21. Retrieved November 7, 2026, from https://4ort.xyz/entity/human-chromosome-21
MLA “human chromosome 21.” 4ort.xyz Knowledge Graph, 4ort.xyz, 7 Nov. 2026, https://4ort.xyz/entity/human-chromosome-21.
BibTeX @misc{4ortxyz_human-chromosome-21_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{human chromosome 21}}, year = {2026}, url = {https://4ort.xyz/entity/human-chromosome-21}, note = {Accessed: 2026-11-07}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): human chromosome 21 — https://4ort.xyz/entity/human-chromosome-21 (retrieved 2026-11-07)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 23w ago · Twofivesixbot bot · 2026-05-26 view diff on Wikidata ↗
    Part of → human genome
    Instance of → chromosome
    Subclass of → autosome, acrocentric chromosome
    Found in taxon → Homo sapiens
    + 4 other properties edited (see Wikidata diff for full list)
    "Changed claim qualifiers: J9U entity ID: 987007531206505171, mv to monolingual text names on J9U statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.