Again, my examples of heterozygote advantage offer a useful illustration.

同样，我的杂合子优势示例提供了一个有用的说明。

Evolutionary biologists call this phenomenon heterozygote advantage.

物学家称这种现象为杂合子优势。

So heterozygote advantage can help explain why problematic versions of genes persist at high frequencies in certain populations.

因此杂合子优势可助解释为什么有问题的基因版本在某些人群中高频率持续存在。

But the unusual prevalence of the Tay-Sachs mutation in Ashkenazi populations may be another example of heterozygote advantage.

但德系人群中 Tay-Sachs 突变的异常流行可能是杂合子优势的另一个例子。

This idea that there can be circumstances in which heterozygotes are better off might sound familiar to some of you.

有些人可能听起来很熟悉杂合子可能在某些情况下过得更好的想法。

This phenomenon is called heterozygote advantage; and its unfortunate consequence is a high rate of sickle cell disease in people from those parts of the world.

该现象被称为杂合子优势；其伴随的不幸后果是这些地区有高比例的镰状细胞病患者。