嘌呤为嘧啶取代或嘧啶为嘌呤所取代，叫做颠换。

The substitution of a purine for a pyrimidine, or vice versa is a transversion.

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结果显示：碱基变异的类型包括转换、颠换和缺失。

The results show that the types of DNA base mutation included the transition, the transversion and the deletion.

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结果显示：碱基变异的类型包括转换、颠换和缺失。

The results show that the types of DNA base mutation included the transition, the transversion and the deletion.

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