单词：point mutation
point mutation的用法和样例：
例句
- Based on the number of restriction enzyme detecting RFLPs, most of mutations were attributed to point mutation.根据揭示多态性的限制性内切酶的数量可将产生的突变大多归为点突变。
- Moreover, molecular biology has discovered mechanisms for genetic change that go beyond point mutations, and these expand the ways in which new traits can appear.此外，分子生物学家已经发现，导致基因变化的机制不只是点突变，因此新性状出现的途径不只一个。
- gene mutation基因突变
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