Anatomy

Pseudoautosomal Regions

Homologous chromosomal regions at either end of the X CHROMOSOME or Y CHROMOSOME. These two regions pair regularly at male MEIOSIS and undergo RECOMBINATION. Pseudoautosomal region 1 (PAR1) is located at the tip of the short 'p' arms (Xp22 and Yp11) and Pseudoautosomal region 2 (PAR2) is located at the tip of the long 'q' arms (Xq28 and Yq12).

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

Homologous chromosomal regions at either end of the X CHROMOSOME or Y CHROMOSOME. These two regions pair regularly at male MEIOSIS and undergo RECOMBINATION. Pseudoautosomal region 1 (PAR1) is located at the tip of the short 'p' arms (Xp22 and Yp11) and Pseudoautosomal region 2 (PAR2) is located at the tip of the long 'q' arms (Xq28 and Yq12).

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MeSH Record

Synonyms

1 entry terms
  • Pseudoautosomal Region

MeSH Record

Aspects Covered

15 allowable subheadings

Indexed with the subheadings chemistry, classification, drug effects, enzymology, genetics, immunology, metabolism, microbiology, parasitology, pathology, physiology, radiation effects, transplantation, ultrastructure, virology.

MeSH Record

History Note

2017

MeSH Record

Previous Indexing

  • Recombination, Genetic (1986-2016)
  • X Chromosome (1986-2016)
  • Y Chromosome (1986-2016)

MeSH Hierarchy

Tree Numbers

  1. A11w.284w.187w.865w.400w
  2. G05.360w.162w.865w.400w
  3. G05.360w.340w.024.380w.906w

AMA Style

References

  1. National Library of Medicine. Pseudoautosomal Regions. Medical Subject Headings (MeSH). 2026. Unique ID D000071439. http://id.nlm.nih.gov/mesh/2026/D000071439
  2. Pseudoautosomal Regions. In: Wikipedia. https://en.wikipedia.org/wiki/Pseudoautosomal_region
  3. Pseudoautosomal Regions. In: Wikidata. https://www.wikidata.org/wiki/Q2115752