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TOEFL IELTS BNC: 6291 COCA: 8622

[ U ] the way in which genes change and produce permanent differences(基因的)变异,突变

It is well known that radiation can cause mutation.众所周知,辐射可能造成基因突变。

[ C ] a permanent change in an organism, or the changed organism itself(生物体的)变异,突变;突变生物体

Environmental pressures encourage genes with certain mutations to persist and others to die out.环境的影响使发生了某些突变的基因存活下来,另一些则消亡了。
These plants carry the mutation for red flowers.这些植物携带红花变种。

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