Some More Responses to TQTQ 1-8-09

I have a few minutes here and with my cup of coffee in hand here goes -

Inwoo asked - Without centrioles, how do plant cells split? It is interesting that though animal cells have centrioles, plant cells do not. So clearly the organization of the spindle does not require centrioles. But I read Inwoo's question as asking about chromatid splitting during anaphase. The movement of chromatids is due to the action of kinetochore motor proteins "walkimg" along a kinetochore microtubule, dragging its chromatid along.

Gotta go,

Jon