Final answer:
When someone inherits one allele for brown eyes and one allele for blue eyes, they will typically have brown eyes because the brown allele is dominant over the blue allele.
Step-by-step explanation:
In humans, brown eye color is a dominant trait and blue eye color is a recessive trait. When someone inherits one allele for brown eyes and one allele for blue eyes, they will typically have brown eyes. This is because the brown allele is dominant over the blue allele. Even though they have one copy of each allele, the presence of the brown allele leads to the production of enough melanin in the iris to make it appear brown.