Prophase of spermatogonial mitosis, showing two exceptionally large chromosomes of equal length.
"Studies in Spermatogenesis (Part 1 of 2)" by Nettie Maria Stevens
Figure 145 is a prophase showing the bivalent chromosomes still connected by linin fibers.
"Studies in Spermatogenesis" by Nettie Maria Stevens
The prophase covers all changes up to the completion of the mitotic figure.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8" by Various
In prophase and prometaphase, cohesin release from chromosome arms occurs under the control of Polo-like kinase 1 and Aurora B, while Shugoshin is thought to prevent removal of centromeric cohesin until anaphase.
Stained with Giemsa during late prophase (1000-band) stage.
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