3 sentences

1. 这种化学物质能够诱导基因突变。

   zhè zhǒng huà​xué wù​zhì néng​gòu yòu​dǎo jī​yīn tū​biàn.

   This chemical can induce genetic mutations.

   Source: Dong Chinese Dictionary

2. 这种病毒发生了基因突变，变得更具传染性。

   zhè zhǒng bìng​dú fā​shēng le jī​yīn tū​biàn, biàn de gèng jù chuán​rǎn​xìng.

   The virus has mutated genetically, becoming more contagious.

   Source: Dong Chinese Dictionary

3. 由于局势突变，我们不得不取消计划。

   yóu​yú jú​shì tū​biàn, wǒ​men bù​dé​bù qǔ​xiāo jì​huà.

   Due to a sudden change in the situation, we had to cancel the plan.

   Source: Dong Chinese Dictionary