Here's a breakdown:

* Genes: These are the basic units of heredity, containing instructions for building and maintaining an organism. They are made of DNA.

* DNA: This is a long, complex molecule that contains the genetic code. It's like a blueprint for an organism.

* Chromosomes: These are structures found in the nucleus of every cell. They are made of tightly coiled DNA, and each chromosome contains many genes.

* Humans have 23 pairs of chromosomes (46 total), with one chromosome from each pair coming from our mother and the other from our father.

So, to summarize, genes are located on chromosomes, which are made of DNA. This DNA carries the genetic information that determines our traits.