Homologous chromosome pairing: The linchpin of accurate segregation in meiosis. 2024

Yuqi Tian, and Libo Liu, and Jinmin Gao, and Ruoxi Wang
Center for Cell Structure and Function, College of Life Sciences, Key Laboratory of Animal Resistance Biology of Shandong Province, Shandong Normal University, Jinan, China.

Meiosis is a specialized cell division that occurs in sexually reproducing organisms, generating haploid gametes containing half the chromosome number through two rounds of cell division. Homologous chromosomes pair and prepare for their proper segregation in subsequent divisions. How homologous chromosomes recognize each other and achieve pairing is an important question. Early studies showed that in most organisms, homologous pairing relies on homologous recombination. However, pairing mechanisms differ across species. Evidence indicates that chromosomes are dynamic and move during early meiotic stages, facilitating pairing. Recent studies in various model organisms suggest conserved mechanisms and key regulators of homologous chromosome pairing. This review summarizes these findings and compare similarities and differences in homologous chromosome pairing mechanisms across species.

UI MeSH Term Description Entries
D008540 Meiosis A type of CELL NUCLEUS division, occurring during maturation of the GERM CELLS. Two successive cell nucleus divisions following a single chromosome duplication (S PHASE) result in daughter cells with half the number of CHROMOSOMES as the parent cells. M Phase, Meiotic,Meiotic M Phase,M Phases, Meiotic,Meioses,Meiotic M Phases,Phase, Meiotic M,Phases, Meiotic M
D002875 Chromosomes In a prokaryotic cell or in the nucleus of a eukaryotic cell, a structure consisting of or containing DNA which carries the genetic information essential to the cell. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed) Chromosome
D059765 Homologous Recombination An exchange of DNA between matching or similar sequences. Homologous Recombinations,Recombination, Homologous,Recombinations, Homologous
D020090 Chromosome Segregation The orderly segregation of CHROMOSOMES during MEIOSIS or MITOSIS. Chromosome Segregations,Segregation, Chromosome,Segregations, Chromosome
D023902 Chromosome Pairing The alignment of CHROMOSOMES at homologous sequences. Synapsis,Synapsis, Chromosomal,Chromosomal Synapsis,Chromosome Pairings

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