Bi-orientation of achiasmatic chromosomes in meiosis I oocytes contributes to aneuploidy in mice

Anna Kouznetsova, Lisa Lister, Magnus Nordenskjöld, Mary Herbert, Christer Höög

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94 Citations (Scopus)

Abstract

The spindle assembly checkpoint guards against chromosomal missegregation but does not induce arrest in oocytes that contain a few achiasmatic chromosomes (univalents). We followed the fate of univalents in oocytes during the first meiotic division, and although these preserved a meiotic kinetochore structure, they were also bi-oriented in a mitotic manner. The hybrid chromosomal configuration attained by univalents allows them to evade the spindle assembly checkpoint and contribute to aneuploidy in oocytes.

Original languageEnglish
Pages (from-to)966-968
Number of pages3
JournalNature Genetics
Volume39
Issue number8
DOIs
Publication statusPublished - Aug 2007
Externally publishedYes

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