Here's a breakdown:

* Heredity is the passing of traits from parents to offspring. This occurs through genes, which are units of heredity that are responsible for a particular trait.

* Genes are located on chromosomes, which are thread-like structures found in the nucleus of cells.

* During reproduction, each parent contributes one set of chromosomes to their offspring. This means the offspring inherits half of its genetic material from its mother and half from its father.

Let me know if you have any other questions about heredity or genetics!