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. 2009 Jan 23;5(1):e1000348. doi: 10.1371/journal.pgen.1000348

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Hughes et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Time-lapse of a live FM7/X oocyte is shown with only DNA fluorescence. A) Both achiasmate Xs (arrows) can be visualized on the right side of the spindle. In B and C the Xs move together and rejoin. In (D–H) the rejoined homologs move together back to the spindle midzone. Arrows point to separated or associated X chromosomes, while arrowheads point to separated or associated 4 ^th chromosomes, when they can be observed apart from the main chromosomal mass.