People have two versions (known as alleles) of each gene, one from each parent.

人类拥有分别来自父亲与母亲的两血清素转运体基，基有两种版本（被称为等位基）。

But they may have different alleles, which are alternatives of the same genes.

但是他们可能有不同的等位基，这些等位基是相同基的替代品。

Each of our genes can come in different flavors, called alleles.

我们的一种基都有不同的形式，称为等位基。

For each gene, humans inherit one allele from each parent, and many plants do, too.

对基，人类从亲本遗传一等位基，许多植物也是如此。

The tornado was totally random, but resulted in major allele changes to the population!

这场龙卷风是完全随机的，但导致了番茄种群的主要等位基变化！

Alleles are the parts of a chromosome that encode specific genetic traits.

等位基是染色体上定遗传征的部分。

Alleles interact to produce traits, or the visible characteristics of an organism.

等位基相互作用产生性状，或生物体的可见征。

This differs from most genes in the genome, where both the maternal and paternal copies are expressed.

正常情况下，来自亲本两方的等位基都会表达，而印记基仅表达一方亲本来源的同源基。

So some have two short alleles, some have two long ones, and the rest have one of each.

所以，有些人拥有两短型等位基，有些人拥有两长型等位基，剩下的则长型短型各一。

This special genetic process is called imprinting, where only one copy of the gene gets expressed, not both.

这一殊的遗传学过程称为“印记”，印记基的存在使得两等位基中的一表达而另一不表达。

In these two genera, the alleles that allow the synthesis of muscarine, have been completely lost, or silenced.

在这两类属中，允许合成毒蕈碱的等位基已经完全丢失或静默。

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

剩下的几番茄恰好有 10% 的大 C 和 90% 的小 C 等位基频率。

Having the G allele means you'll have a lower level of serotonin in your brain.

拥有G等位基意味着你大脑中的血清素含量较低。

Sometimes mutations don't affect an organism, but sometimes they can result in brand-new alleles.

有时突变不会影响有机体，但有时它们会产生全新的等位基。

Notice the G allele may be the culprit here.

注意，G等位基可能才是罪魁祸首。

That's the allele frequency of the tomato color gene in that population.

这就是这群体中番茄颜色基的等位基频率。

Evolution is simply the change in allele frequencies in a population over time.

进化只是一种群中等位基频率随时间而产生的变化。

A similar situation can happen with gene flow, when new alleles are introduced to a population through migration.

类似的情况也会发生在基流动中——新的等位基通过迁徙被引入到一群体之中。

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，为其种族基库增加新的等位基。

Just like humans, canines inherit one allele from each parent for a certain gene.

就像人类一样，犬类也会从父母那里继承一等位基。