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

但是他们可能有不同的基因，这些基因是相同基因的替代品。

Notice the G allele may be the culprit here.

注意，G基因可能才是罪魁祸首。

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

基因是染色体上编码特定遗传特征的部分。

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

所以，有些人拥有两短型基因，有些人拥有两长型基因，剩下的则长型短型各一。

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

我们的每一种基因都有不同的形式，称为基因。

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

拥有G基因意味着你大脑中的血清素含量较低。

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

对于每基因，人类从每亲本遗传一基因，许多植物也是如此。

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

基因相互作用产生性状，或生物体的可见特征。

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

在这两类属中，允许合成毒蕈碱的基因已经完全丢失或静默。

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因，每基因有两种版本（被称为基因）。

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因的基因频率。

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

正常情况下，来自亲本两方的基因都会表达，而印记基因仅表达一方亲本来源的同源基因。

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

这一特殊的遗传学过程称为“印记”，印记基因的存在使得两基因中的一表达而另一不表达。

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

进化只是一种群中基因频率随时间而产生的变化。

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

就像人类一样，犬科动物从每父母那里继承一特定基因的基因。

But why are these called " ghost" alleles?

但为什么这些被称为“幽灵”基因呢？

And freckles because you got the freckle allele from your mom.

还有雀斑，因为你从你妈妈那里得到了雀斑基因。

It says, the findings of these HLA alleles may have some practical implications as well.

它说, 这些HLA基因的发现也可能有一些实际意义。

So the chromosome from your dad may carry the blue eye allele, and the one from your mum may carry the green eye allele.

所以来自你父亲的染色体可能携带蓝眼基因，而来自你母亲的染色体可能携带绿眼基因。

The long allele participants also had a tendency to be risk-takers and succumb to addictive behaviors such as alcoholism.

长基因的参与者也有冒险的倾向，并屈服于酗酒成瘾行为。