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凡是由受精卵发育而来，且体细胞中含有两个染色体组的生物个体，均称为二倍体。可用2n表示。人和几乎全部的高等动物，还有一半以上的高等植物都是二倍体。中文名二倍体细胞外文名diploid cell来源受精卵发育而来表示方法2n表示目录1概念和来