Then we can really start to look at the genetic variation within the species and gain insight into some of the genes involved in drug resistance or virulence.

然后我们才能真正地开始寻找该物种的种内遗传变异，并获得和耐药性或毒力有关的一些基因的信息。

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Some lifestyles, and some forces of nature, act to reduce genetic variation; others act to promote it.

如生活方式、自然力量、减少基因变异的行为；还有一些促进这个进程的行为。

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Somaclonal variation occurs in tissue and embryo culture even without genetic modification, but genetic modification often makes it worse.

体细胞无性系变异发生在组织和胚胎的培养，即使没有基因改造，但基因改造往往使情况变得更糟。

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It is also involved in the International HapMap Project, a five-country initiative launched in October, to follow up the Human Genome Project with a large-scale study of human genetic variation and its relation to disease.

ECONOMIST: Chinese biotechnology

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).

FORBES: Epigenetics: The Revolution That Wasn't

These studies have been made possible by the growth in catalogues and maps of genetic variation among human populations, as well as differences with our closest relatives, such as Neanderthal and chimpanzee.

FORBES: The Human Genome at Ten