metaphase
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Introduction
The stage in mitosis or meiosis in which the chromosomes become aligned on the equatorial plane of the cell separating the centromeres.
In mitosis & the 2nd 1/2 of meiosis, the centomeres of each chromosome divide & the 2 daughter centromeres migrate to opposite poles of the cell.
In the 1st 1/2 of meiosis, the centromeres do NOT divide, but the centromeres of each homologous pair of chromosomes migrate to opposite poles of the cell.
Colchicine is used to arrest chromosomes in metaphase.