Has only half of the diploid chromosomal content that most of the cells, which are called somatic cells in our body have.

卵子中只含有我们机体一半的染色体,二倍体基因组中一半的染色体,这些二倍体细胞称为体细胞

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The result of fertilization now is a new cell that is the union of the sperm and the egg, and it's called the zygote and it contains the diploid number of chromosomes, genes.

受精就是产生,一个精卵结合的新细胞,称为受精卵,它含有二倍体的染色体基因

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So before a cell enters mitosis it has to have synthesized its DNA so it has two copies of all of its chromosomes.

所以在进入有丝分裂之前,细胞必须先合成DNA,所以它含有两套染色体拷贝

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There could be differences in the physics of cell division, this process of separating into two cells such that even though they both have the same chromosomes, they both have the same DNA content, maybe one of the cells entraps something that's different than the other cells.

细胞分裂的过程中的确可能会产生差异,在分裂为两个细胞的过程中,尽管两个子细胞含有相同的染色体,含有相同的DNA组成,但也许其中一个细胞,截留了和其他细胞不同的物质

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