* Nucleus: The nucleus is the largest structure. It's a membrane-bound organelle found in eukaryotic cells (cells with a defined nucleus). The nucleus acts like the cell's control center, housing the genetic material.
* Chromosomes: Chromosomes are long, thread-like structures made of DNA and proteins found within the nucleus. They are essentially tightly packaged bundles of DNA. During cell division, chromosomes become visible under a microscope.
* Genes: Genes are segments of DNA that carry the code for specific traits. Think of them like individual instructions within a long instruction manual (the chromosome). Each gene occupies a specific location on a chromosome.
In summary:
* Nucleus > Chromosomes > Genes
