Neutral mutation — Evolution at the molecular level is primarily determined by mutational input and random genetic drift, rather than by natural selection.
天然突变——演化过程中在分子的层次上主要是经由随机的基因流而决定，并非借由天择所影响。
The choice of nucleotide changes in DNA evolution can be either selectively neutral or biased.
DNA分子进化中，对核苷酸替换的选择可呈选择中性或选择倾向性。
The choice of nucleotide changes in DNA evolution can be either selectively neutral or biased.
DNA分子进化中，对核苷酸替换的选择可呈选择中性或选择倾向性。
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