表观遗传变异是由附属于基因的其他分子作用引起基因表达改变的可遗传的变异。
Epigenetic changes are heritable changes to the regulation of a cell's genes, caused by extra molecules being attached to those genes.
表观遗传学是近年来新兴起的生物学学科，主要研究在没有DNA序列改变情况下基因功能可逆的、可遗传的变异。
Epigenetic is the latest biological science in recent years, which mainly researches gene function reversible and heritable variation without DNA sequence changes.
遗传科学的核心是一个高见：基因序列中可识别的变异可以预测一个人学习、推理和解决问题的能力。
Central to hereditarian science is a tall claim: that identifiable variations in genetic sequences can predict an individual's aptness to learn, reason and solve problems.
大部分百岁老人有着这150个变异的子集，研究者发现他们的基因图谱可归类到19个不同的遗传特征。
Most centenarians possess a subset of the 150 variants, and the researchers found that their genetic profiles cluster into 19 different genetic signatures.
由于母体的可遗传变异使得这些特殊的细胞不可能被用于繁殖，但是能够帮助科学家总结出繁殖过程。
Although this particular batch of cells is unlikely to be used for assisted reproduction because of the donor's heritable mutation, it will help scientists work the process out.
这就印证了变异基因是自然选择保留下来的结果，可它却不能回答自然选择为什么会成了遗传疾病的帮凶，但在一些特殊的条件下，进化能够产生这样的结果。
But it does not answer the question of how evolution can favour genetic diseases. However, in certain circumstances, evolution can.
研究结果首次证实了百脉根通过航天诱变处理可以得到多种类型的突变体，并且变异频率高、突变可稳定遗传。
The results approved for the first time that we can obtained various Lotus Japonicus mutants through space flight mutation, and mutant frequency was higher, most of the mutations could stable inherit.
研究结果首次证实了百脉根通过航天诱变处理可以得到多种类型的突变体，并且变异频率高、突变可稳定遗传。
The results approved for the first time that we can obtained various Lotus Japonicus mutants through space flight mutation, and mutant frequency was higher, most of the mutations could stable inherit.
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