It sounds like you're asking about chromosomes, which are the bundles of DNA found in the nucleus of most cells.

Here's why:

* DNA: DNA is the genetic material that contains instructions for building and maintaining an organism.

* Genes: Genes are specific segments of DNA that code for particular traits or characteristics.

* Chromosomes: Chromosomes are long, thread-like structures made of DNA and protein. They organize and package DNA in a way that allows for efficient replication and division of the genetic material during cell division.

So, genes are located on chromosomes, and chromosomes are the bundles found in the nucleus of most cells.