Polyploid is a remarkable characteristic in the chromosome evolution of higher plant, and about 70% of angiosperms have experienced polyploidization once or more in their evolutionary history.
No matter what plant or animal, the chromosome in its karyon has a certain number and shape.
无论是动物还是植物，其细胞核内的染色体，不仅具有一定的数目，而且还有一定的形状。
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A poisonous, pale-yellow alkaloid, C22H25NO6, obtained from the autumn crocus and used in plant breeding to induce chromosome doubling and in medicine to treat gout.