Humans then chose to mate individual animals or plants that carried the particular gene in order to make the desired characteristics more common or more pronounced.
之后人类选择具有独特基因的动物或植物个体进行配对，使它们那些为人所需的特性变得更为普遍和显著。
2
Sequencing involves determining the order of the bases — the chemical units of DNA that are represented by the letters A, C, G and T — in a gene or on a chromosome.
测序涉及确定的基础秩序 - 在基因或染色体 - DNA的是用字母A，丙，G和T代表的化学单位。
3
Some suspect that, rather than sending gene-activating and gene-stifling proteins to particular gene targets, chromosomes adjust their shape in order to bring genes closer to the proteins.