Miescher found a substance he didn't recognize and called it nuclein (because it resided in the nuclei of cells).

米歇尔发现了一种他不认识的物质，他给它取名为核素（因为它寄居在细胞核里）。

So there you have DNA, you should know that it is usually found in the chromosomes within the nuclei of cells.

这就是 DNA，你们应该知道它通常存在于细胞核内的染色体中。

While most of an animal's genes are contained in chromosomes located inside the nuclei of cells, the amh gene remains apart, floating freely within the cell nucleus.

虽然动物的大部分基因都包含在位于细胞核内的染色体中，但 amh 基因仍然分开，在细胞核内自由浮动。