Mutation are produced by a number of chemicals . 许多化学试剂能产生突变。
Spontaneous and induced mutation occur with animals viruses . 动物病毒的突变有自发突变和诱发突变。
If the heterocaryon does grow then the mutations are probably non-allelic . 如果异核体能够生长，那么突变就可能是非等位的。
Suppression is called intragenic when both mutations are within the same gene . 两个突变发生在同一基因内的抑制，叫基因内抑制。
Both frameshift and missense mutations can be suppressed by intragenic suppressors . 移码突变和异义突变都能被基因内抑制基因所抑制。
So far the discussion has centered entirely around mutation in the strict sense . 到目前为止，严格来讲，讨论完全集中于围绕突变问题上。
Genetic effects include inheritable changes resulting from mutations in reproductive cells . 遗传的影响包括再生细胞变异引起的遗传变化。
It was impervious to the shocks and mutations of timeit was an emblem of time itself . 它不受时代的冲击或变迁的影响，它自己就是时间的象征。
In the narrow sense, the hypothesis implies that mutations in genes result in mutations in enzymes . 在狭义上说，这一假说表示基因突变的结果导致酶的突变。
The physical conditions of each country, as well as the numbers and kinds of its inhabitants, have undergone many mutations . 每一地域内的物理条件和土著生物的种类与数目，都是曾经多次变动。
