But a shallow gene pool can be a weakness, too.

但是，一个浅薄的基因库也可能是一个弱点。

Over fishing, shark poaching and the weak gene pool have all contributed.

过度捕鱼、偷猎及它们群内繁殖率低造成了现在的结果。

India's lions are particularly vulnerable because they have a limited gene pool.

印度狮特别脆弱，因为它们的基因库有限。

Those seeds then start to grow, adding new alleles to our population's gene pool.

然后这些种子开始生长，为其种族基因库增加新的等位基因。

A few hundred Choctaw horses have been bred in Oklahoma but the gene pool is small.

俄克拉荷马州培育了几百只乔克托马，但基因库还是很小。

In particular, he deplores the incestuous narrowing of the gene pool that modern pedigree breeders have brought about.

他尤其反对现今为保证 狗种纯正而让狗近亲繁殖，导致狗的基因库缩小。

There's largely the same gene pool in northern northwest North America today that there was ten thousand years ago.

“如今，北美西北面北部地区的基因库与一万年前的基本相同。”

As long as males show up from time to time to help to the gene pool, females can reproduce alone.

它们只需要雄虫能时不时地出现起到丰富基因的作用而雌虫自己就能够繁殖。

It may be smaller than some collections elsewhere in the world but the gene pool here is one of a kind.

它可能会比世界其他地方的一些基因库要小，但这里的基因库是独一无二的。

The researchers also found that both populations were very similar genetically, suggesting that they're all members of the same gene pool.

研究人员还发现，这两个群体在基因上非常相似，这表明它们属于同一个基因库。

MANAGERS of zoos across North America are facing a mammoth problem: the gene pool among captive African elephants has grown woefully small.

现在，北美洲的动物园经理都面临着一个严重的问题：人工饲养非洲象的基因多样性已有 所减少，实在令人痛惜。

Let's face facts. It's in your gene pool.

面对现实吧，上梁不正下梁歪。

Evolution is simply change in the gene pool over time.

演化指的是基因库里随时间累积的变异。

This would obviously change the frequency in the gene pool.

基因库里的遗传机率会随之变化。

Over time beneficial traits and characteristics that promote survival will be kept in the gene pool while those that harm survival will be selected against.

随着时间的推移，促进生存的有益特征将保留在基因库中，而那些危害生存的特征会被剔除。

Over time, beneficial traits and characteristics that promote survival will be kept in the gene pool while survival that harm survival will be selected against.

随着时间的推移，促进生存的有益的特征和特点被保留在了基因库里，而那些有损生存的生存则会被剔除。

For instance, if women find taller men more attractive, then more tall men would mate and have children, putting more tall genes in the gene pool.

比如说，如果女性发现长得高的男性更具吸引力，然后更多高大男人会交配生子，基因库中就会有更多的高大基因。

Having reduced the species to a handful of individuals (125, Dr Shapiro estimates), Homo sapiens set about saving it -- at another price to its gene pool.

在将该物种减少到为数不多的个体（夏皮罗博士估计为125个）后，智人开始拯救它——代价是污染野牛的基因库。

Sometimes they even become 'fixed, ' which means that they become the only version of the gene left in the gene pool.

有时它们甚至变得“固定”，这意味着它们成为基因库中留下的唯一基因版本。

Over time, beneficial traits and characteristics that promote survival will be kept in the gene pool while traits and characteristics that harm survival will be selected against.

随着时间的推移，促进生存的有益的特征和特点被保留在了基因库里，而那些有损生存的特征和特点则会被剔除。