The trait expressed when two different genes for the same characteristic are present is called the dominant trait.

Here's why:

* Genes and Alleles: Genes are segments of DNA that code for specific traits. Each gene can have multiple forms called alleles.

* Dominant and Recessive: When you have two different alleles for a gene, one allele may be dominant over the other. The dominant allele's trait will be expressed, while the recessive allele's trait will be masked.

For example, let's consider eye color:

* Brown eyes (B): The brown eye allele is dominant.

* Blue eyes (b): The blue eye allele is recessive.

If someone has one allele for brown eyes (B) and one allele for blue eyes (b), they will have brown eyes because the brown eye allele is dominant.

Let me know if you have any other questions!