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X and Y Chromosomes: Homologous Regions

  1. Nisrine El-Mogharbel,
  2. Jennifer AM Graves

Published Online: 14 MAR 2008

DOI: 10.1002/9780470015902.a0005793.pub2



How to Cite

El-Mogharbel, N. and Graves, J. A. 2008. X and Y Chromosomes: Homologous Regions. eLS. .

Author Information

  1. Australian National University, Canberra, Australia

Publication History

  1. Published Online: 14 MAR 2008


The human X and Y chromosomes have quite different deoxyribonucleic acid (DNA) and gene contents, and appear completely cytologically nonhomologous. However, they share many homologous regions, the relics of a process of gradual evolution from a homologous autosomal pair into the differentiated sex chromosome pair they are today.


  • sex chromosomes;
  • PAR1;
  • PAR2;
  • nonrecombining region;
  • homologous regions