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End Association and Segregation of the Achiasmatic X and Y Chromosomes of the Sand Rat, Psammomys Obesus

Overview
Journal Chromosoma
Specialty Molecular Biology
Date 1980 Jan 1
PMID 6993128
Citations 19
Authors
T Ashley
M J MOSES
Affiliations
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Abstract

In Psammomys obesus there is no pairing between the X and Y chromosomes and no chiasma formation (Solari and Ashley, 1977). It is demonstrated that ends of the axial elements of the X and Y chromosomes come together during pachytene, and regularly form at least one end-to-end junction. This achiasmatic physical connection between the ends of the X and Y persists until anaphase I, thus assuring the normal distribution of the sex chromosomes observed by light microscopy. In addition, there are no differentiations of the axes of the X and Y similar to those observed in other mammalian species thus far examined, a fact that could influence chromatid cohesiveness and disjunction.

Citing Articles

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Meiosis reveals the early steps in the evolution of a neo-XY sex chromosome pair in the African pygmy mouse Mus minutoides.

Gil-Fernandez A, Saunders P, Martin-Ruiz M, Ribagorda M, Lopez-Jimenez P, Jeffries D PLoS Genet. 2020; 16(11):e1008959.

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A high-density genetic map and molecular sex-typing assay for gerbils.

Brekke T, Supriya S, Denver M, Thom A, Steele K, Mulley J Mamm Genome. 2019; 30(3-4):63-70.

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Dumont B, Williams C, Ng B, Horncastle V, Chambers C, McGraw L Genetics. 2018; 210(1):83-97.

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References
1.
Counce S, Meyer G . Differentiation of the synaptonemal complex and the kinetochore in Locusta spermatocytes studied by whole mount electron microscopy. Chromosoma. 1973; 44(2):231-53. DOI: 10.1007/BF00329119. View
2.
Tres L . Extensive pairing of the XY bivalent in mouse spermatocytes as visualized by whole-mount electron microscopy. J Cell Sci. 1977; 25:1-15. DOI: 10.1242/jcs.25.1.1. View
3.
Solari A . The relationship between chromosomes and axes in the chiasmatic XY pair of the Armenian hamster (Cricetulus migratorius). Chromosoma. 1974; 48(1):89-106. DOI: 10.1007/BF00284869. View
4.
MOSES M . Synaptonemal complex karyotyping in spermatocytes of the Chinese hamster (Cricetulus griseus). II. Morphology of the XY pair in spread preparations. Chromosoma. 1977; 60(2):127-37. DOI: 10.1007/BF00288460. View
5.
Solari A . The behavior of the XY pair in mammals. Int Rev Cytol. 1974; 38(0):273-317. DOI: 10.1016/s0074-7696(08)60928-6. View