genetic drift

genetic-drift的词性：
n.（名词）

1. Random fluctuations in the frequency of the appearance of a gene in a small, isolated population, presumably owing to chance rather than natural selection.
遗传漂变：在一个小的、与世隔绝的种族里，基因面貌频率上的偶然波动，可能因为偶然性而不是自然选择