Here's a bit more detail:

* Alleles are alternative forms of a gene that reside at the same locus (position) on a chromosome.

* Each individual inherits one allele from their mother and one from their father, creating a gene pair.

* The combination of these two alleles determines an individual's traits.

For example, the gene for eye color has multiple alleles, including brown, blue, and green. A person might inherit a brown allele from their mother and a blue allele from their father, resulting in brown eyes.