This is the first time scientists have successfully passed on a foreign gene to a future generation.
VOA: special.2009.06.23
There were a few things I didn't get to finish last time in talking about particularly gene transfer in mammals.
我们还有一些上次未完成的内容要讲,尤其是哺乳动物的基因导入
There are molecules in cells that give the DNA the signal that it's time to transcribe and express a gene, those are called transcription factors, we'll talk about them a bit later.
在细胞中有些分子能够,给DNA发出信号告诉它,是时候转录和表达某基因了,这些分子叫做转录因子,晚些时候我们会讲它们
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