genetic drift

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This “genetic drift” happens at a constant rate.
这种“遗传漂变”以恒定的速率产生结果。
One is that because tropical species often have smaller populations than temperate ones, they are more susceptible to genetic drift.
一种假说认为生长在热带地区的物种比温带物种的种群小，所以受遗传漂变的影响更大。
There is no doubt that most of the genetic differences between humans and other apes – and between different human populations – are due to genetic drift.
毫无疑问，人类与猿猴之间以及不同人群之间的大部分基因差异都是因为基因漂变而产生。

Modern evolutionary biology as we understand it, which is to say variation via genetic drift, mutations, duplications combined with the pruning filter of natural selection, certainly explains a great deal.
FORBES: Evolution and Embodied Physiology
The lawsuits, pain and suffering for all involved, the questions of hybridized genetic drift, far too massive, scientifically complex, and global in scope to even intimate in an opinionated response to a vested opinion.
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What we learn from these areas is precisely how evolution has acted to sculpt bodies, but it still does so using randomly-generated genetic variation and good old natural selection (and yes, Larry Moran, genetic drift also plays a role).
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a situation in which the frequency of a particular gene in a small population of living things changes without a known cause