Let's go back to our original tomato population with the 70% big C and 30% little c allele frequency.

让我们回到原来的番茄群体 70% 的大 C 和 30% 的小 C 等位基因频率。

The few remaining tomatoes just happen to have an allele frequency of 10% big C and 90% little c.

剩下的几个番茄恰好有 10% 的大 C 和 90% 的小 C 等位基因频率。

My name is uppercase C. Call me Big C Big C. I am C, too.

我的名字是大写的C.叫我大C大C。我也是C。

Say there's a gene that tells a tomato what color to be, and it comes in two alleles, big C and little c.

假设有一个基因决定番茄的颜色，它有两个等位基因，大 C 和小 C。

In other words, two big C's or a combination of a big C and a little c would make the tomato red.

换句话说，两个大 C 或者大 C 和小 C 的组合会让番茄变红。

If a tomato inherits two little c alleles from its parents, it'll be yellow, but if it inherits at least one big C allele, it'll be red.

如果一个番茄从它的父母那里继承了两个小 C 等位基因，它就会是黄色的，但如果它至少继承了一个大 C 等位基因，它就会是红色的。

Non-random mating won't change allele frequencies, but will change the combinations of alleles in a population, those pairings of two big C's, two little c's, or one big C and one little c.

非随机交配不会改变等位基因的频率，但会改变种群中等位基因的组合，那些两个大 C，两个小 C，或者一个大 C 和一个小 C 的配对。

So if we return to those tomatoes a hundred years from now and find that the allele frequency has changed to 50% big C and 50% little c, we'll say that the population of tomatoes has evolved.

所以，如果一百年后我们再看回这些西红柿，发现等位基因频率已经变成了 50% 的大 C 和 50% 的小 C，我们就可以说西红柿种群已经进化了。