Then that mutation would spread until the sex ratio moves back towards more females.

接下来这种转变会持续发展，直到雌雄的比例又变回到雌性数量更多的状况。

These others were chosen to match the study group's age profile, sex ratio and dwelling place.

其他这些人被选择过来以匹配研究对照组的年龄构成，性别比例以及居住地址。

We see 50: 50 sex ratios whenever parents invest the equally in their male and female children.

我们能看见 50 比 50 的比率是因为无论何时父母们都投入了均衡的时间和精力到他们的雄性和雌性后代身上。

Currently, that skewed sex ratio comes out to roughly 10 million more baby boys than girls born worldwide each year.

目前倾斜的性别比导致每年出生的男婴比女婴多约一千万人。某些国家因人为操控。

And In general, we have higher biased sex ratios, where female bias is common.

总的来说，我们有更高的偏见性别比例，其中女性偏见很常见。

That magic 50: 50 sex ratio is the only one that is evolutionarily stable and that, right there, is why we see it again and again and again.

那神奇的均衡性别比例也就是进化的平衡，而这就是为什么这一过程会一直循环往复。

As Jeanette mentioned in the - with her research, they're seeing that drought is forcing the sex ratio bias, where they are going to have almost primarily females being reproduced.

正如珍妮特在她的研究中提到的那样，他们看到干旱正在迫使性别比例偏差，在那里他们将几乎主要繁殖女性。

To test if MT is altering sex ratios, researchers dabbed varying strengths of the chemical onto alligator eggs and then incubated them at a temperature that should yield only females.

为了测试 MT 是否正在改变性别比例，研究人员将不同强度的化学物质涂抹在鳄鱼卵上，然后将它们在应该只产雌性的温度下孵化。

There's a lot to explore in this data, but here's some of the first things we noticed, from an improving sex ratio to the tiny group of households who reported five generations sharing a single room.

这些数据有很多值得探索的地方，但首先，有一些事情值得我们关注，从性别比例的提高到一小部分家庭报告五代人共用一个房间。