6
Question
If a diploid cell is treated with colchicine, then it becomes:
If a diploid cell is treated with colchicine, then it becomes:
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Solution
The correct option is B Tetraploid
A commonly used agent for inducing polyploidy is colchicine, an alkaloid drug extracted from the flowering plant, autumn crocus. In colchicine-treated cells, an S-phase of the cell cycle occurs, but not chromosome segregation or cell division. As the treated cell enters telophase, a nuclear membrane forms around the entire doubled set of chromosomes. Thus, treating diploid (2n) cells for one cell cycle leads to tetraploids (4n), with exactly four copies of each type of chromosome.
A commonly used agent for inducing polyploidy is colchicine, an alkaloid drug extracted from the flowering plant, autumn crocus. In colchicine-treated cells, an S-phase of the cell cycle occurs, but not chromosome segregation or cell division. As the treated cell enters telophase, a nuclear membrane forms around the entire doubled set of chromosomes. Thus, treating diploid (2n) cells for one cell cycle leads to tetraploids (4n), with exactly four copies of each type of chromosome.
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