In other words, mutations arise that have little if any effect, such as a duplicate gene.

换句话说，变异的出现不会产生任何影响，比如某个基因的重复复制。

youdao

On the basis of the charecteristics of the duplicate gene expressions (pleisiomorphy), it is regarded as a primitive species in Catostomidae.

并根据重复基因表达（祖征）情况，认为它应属于较原始的种类。

youdao

If one gene is mutated, a duplicate gene may function in its place.

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