However, many researchers have warned about the difficulties of using genetic processes to actually recreate an extinct species.

然而，许多研究人员警告说，利用遗传过程来真正重建一个灭绝物种是很困难的。

This special genetic process is called imprinting, where only one copy of the gene gets expressed, not both.

这一特殊的遗传学过程称为“印记”，印记基因的存在使得两个等位基因中的一个表达而另一个不表达。