Biology / Unit 5 Bio 0975 short lesson, about 20 seconds
Anaphase I
Captions available
The idea
In anaphase I, chiasmata release and each tetrad's two homologs separate, one full homolog, still two joined sister chromatids, moving to each pole.
In practice
A homolog pulled to one pole in anaphase I still carries its two sister chromatids joined at the centromere.
Where people slip
Anaphase I separates homologs, not sister chromatids — the centromere holding chromatids together stays intact here.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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