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. . Colchicine can be used to alter the chromosome content of a cell by disrupting chromosome disjunction and cell division (

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A is the right answer. Autopolyploid would be the resultant cell after being treated by colchicine. Autopolyploidy is a phenomenon when the cell has more than 2 copies of the chromosomes. Colchicine disrupts the disjunction of the chromosome and the cell enters the cell division cycle but fails to divide and thus autopolyploid cell is formed.

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