Here's a breakdown:

* Alleles: Different versions of the same gene. For example, a gene for eye color might have an allele for blue eyes and an allele for brown eyes.

* Homozygous: When an individual has two identical alleles for a particular gene.

Example:

* If someone has two alleles for brown eyes, they are homozygous for eye color.

Let me know if you have any other questions!