Genes that come together with different alleles are called heterozygous.

Here's a breakdown:

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

* Heterozygous: Having two different alleles for a particular gene.

* Homozygous: Having two identical alleles for a particular gene.

So, if an individual has one allele for brown eyes and one allele for blue eyes, they are heterozygous for the eye color gene.