Here's a breakdown:
* DNA (Deoxyribonucleic Acid): This is the molecule that carries genetic instructions. It's shaped like a twisted ladder called a double helix.
* Genes: These are segments of DNA that contain the instructions for building and maintaining an organism. They act like blueprints for proteins, which perform various functions in the body.
* Chromosomes: These are made up of tightly coiled DNA and proteins. They contain many genes, organized in a specific order.
* Nucleus: This is the control center of the cell, where chromosomes are located.
So, the relationship is: DNA -> Genes -> Chromosomes -> Nucleus.