Genes that always show themselves, meaning they are expressed regardless of the other allele present, are called dominant genes.

Here's a breakdown:

* Alleles: Different versions of the same gene.

* Dominant: An allele that expresses its trait even when paired with a different (recessive) allele.

* Recessive: An allele that only expresses its trait when paired with another copy of itself.

For example, brown eyes are a dominant trait. If you inherit one allele for brown eyes and one for blue eyes, you will have brown eyes because the brown eye allele is dominant.