Biology / Bio 0975 · Atom · ~20 seconds
Anaphase I
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In anaphase I, chiasmata release and each tetrad's two homologs separate, one full homolog, still two joined sister chromatids, moving to each pole.
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A homolog pulled to one pole in anaphase I still carries its two sister chromatids joined at the centromere.
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Anaphase I separates homologs, not sister chromatids — the centromere holding chromatids together stays intact here.