chromosome duplicate
染色体复制
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Cells have two copies of nearly every chromosome (one each from the mother and father) and they must duplicate these during cell division so that the subsequent cells will also have two each.
每条染色体细胞都含有两个拷贝(一个来自母方，一个来自父方)，当细胞分裂时，这些染色体就要复制，因此子代细胞仍有两个拷贝。
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