Here's a breakdown:

* Gene: A segment of DNA that codes for a specific trait, like eye color or height.

* Allele: A variation of a gene. Think of it like different versions of the same software program.

* Example: The gene for eye color can have an allele for blue eyes and an allele for brown eyes.

Important Notes:

* You inherit one allele from each parent for each gene.

* The combination of alleles you have determines your actual physical characteristics (phenotype).

* Alleles can be dominant or recessive. A dominant allele will always express its trait, while a recessive allele only expresses its trait when paired with another recessive allele.

Let me know if you'd like a more detailed explanation about dominant and recessive alleles, or any other aspect of genetics!