Most other animals have this functioning DNA but at some point in our history, a mutation disbled the gene - whilst leaving behind its remnants as junk DNA.
其他大多数动物都有这种有用的DNA，不过在我们的进化史中，有个改变让这种基因失效了——不过还是留下了一点残余，成了废料DNA。
Most other animals have this functioning DNA but at some point in our history, a mutation disbled the gene - whilst leaving behind its remnants as junk DNA.
其他大多数动物都有这种有用的DNA，不过在我们的进化史中，有个改变让这种基因失效了——不过还是留下了一点残余，成了废料DNA。
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