Animal and lower plant cells have microtubule-organizing centers {centrosome}| {spindle pole body}. Spindle pole bodies have RNA and separate to cell sides during mitosis. Centrosomes have centrioles and other proteins.
In cell division, centrioles duplicate, microtubules align between centrioles and connect to duplicated-chromosome centromeres, and centrioles separate, pulling half the chromosomes one way and half the other. Centrioles organize spindle between them during cell division and can duplicate themselves. Bodies have nine microtubule triplets in one circle, with no central microtubules.
Animal and lower plant cells have two separate cylindrical bodies {centriole}|, perpendicular to each other, near cell nucleus, which are centrosome parts. Centrioles organize spindle between them during cell division and can duplicate themselves. Centrioles have nine microtubule triplets in one circle, with no central microtubules.
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Date Modified: 2022.0225