They have now become very powerful tools for the studies of geneevolution and gene function.
现在，它们已经成了研究基因进化和基因功能的非常有用的工具。
2
The first replicator was the gene - the basis of biological evolution.
第一复制因子是指基因——生物进化的基础。
3
Simon Mead of the British prion research centre at University College London says the discovery of an "anti-kuru" gene is the most clear-cut evidence yet of human evolution in action.