| 单词 | 点突变 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔point mutation〕A mutation that affects only one or a few nucleotides in a gene.基因点突变：在一个基因中，只影响一个或几个核苷酸的突变美国传统〔transversion〕A point mutation in which a purine is replaced by a pyrimidine, or a pyrimidine is replaced by a purine.转置点，易位点：用嘧啶代替嘌呤或用嘌呤代替嘧啶的点突变美国传统 |
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