The stronger gene for a trait that always shows up in offspring is called a dominant gene.

Here's a breakdown:

* Dominant Gene: This gene masks the expression of its corresponding recessive gene. If an individual has at least one copy of the dominant gene, the trait associated with that gene will be expressed.

* Recessive Gene: This gene only expresses its trait if two copies of the recessive gene are present.

Example:

* Eye Color: Brown eyes are dominant (B) over blue eyes (b).

* BB: Brown eyes (dominant)

* Bb: Brown eyes (dominant)

* bb: Blue eyes (recessive)

In this case, even if a person has one brown eye gene (B) and one blue eye gene (b), they will have brown eyes because the brown eye gene is dominant. They will only have blue eyes if they have two copies of the blue eye gene (bb).