In natural populations, individuals often are distributed more or less discontinuously to form numerous colonies, and individuals may be exchanged between adjacent or nearby colonies.

在自然种群中，个体往往分布不连续，从而形成或多或少的聚居点，相邻或邻近的聚居点之间有一定的个体交流。

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It's in these populations that we begin to see real changes in the genetic makeup of natural coloring.

正是在这些种群中，我们开始看到自然色彩的基因构成发生了真正的变化。

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But it's hard to tell in most natural populations whether inheritance is due to DNA sequence variation or epigenetic changes.

但在自然界大多数种群中，很难判断遗传是否源于DNA序列改变或者表观基因变异。

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By contrast, in natural populations of fruit flies the number of copies of copia is low around 20 per individual.

ECONOMIST: Truly selfish genes

Recent studies show that there is substantial standing genetic variation in natural populations of planktonic organisms, which provides the raw material for natural selection.

UNESCO: THEMES

Detection of high levels of congenital transmission of Toxoplasma gondii in natural urban populations of Mus domesticus.

FORBES: House Cats Said to Lead to Car Crashes, Suicides, and Mental Disorders