Alternatively, a new version of a gene can also be created through reverse transcription: during gene expression, the mRNA is copied back into a sequence of DNA that is inserted into the genome.
其二,新基因可能透过反转录作用,将基因表现出来mRNA反转录成DNA序列,再插回基因组内,这种现反转录移位(retrotransposition),发生在细胞内长散布核因子(LINE)转位子活动时。