Question

a trait that will always be expressed in the phenotype

Answer 1

A trait that will always be expressed in the phenotype is referred to as a **dominant trait**. In genetics, dominant traits are those that will manifest in the phenotype of an organism even if only one copy of the corresponding allele is present. This means that if an individual carries at least one dominant allele for a trait, that trait will be expressed, regardless of whether the individual has one or two copies of the allele.

For example, in humans, the allele for brown eyes is typically dominant over the allele for blue eyes. Therefore, an individual with one brown eye allele and one blue eye allele will have brown eyes.