基因随机固定 random fixation of gene
- 基因漂变甚至可以抵消自然选择。许多轻度的有益变异会随机丢失,而轻度有害的变异则会传播开来并在人群中固定下来。人口规模越小的群落中,遗传漂变的作用越大。
Genetic drift can even counteract natural selection. Many slightly beneficial mutations can be lost by chance, while mildly deleterious ones can spread and become fixed in a population. The smaller a population, the greater the role of genetic drift.
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