Here's why:

* Genes come in pairs: We inherit one copy of each gene from our mother and one from our father.

* Dominant vs. Recessive: Some genes have different versions called alleles. A dominant allele will express its trait even if only one copy is present. A recessive allele will only be expressed if two copies are present.

Example:

* Brown eyes are dominant over blue eyes. This means that if someone inherits one gene for brown eyes and one for blue eyes, they will have brown eyes.

Key Points:

* Dominant traits are often more common. This is because they only need one copy of the gene to be expressed.

* Recessive traits can "skip a generation." If both parents carry a recessive gene, their child has a chance of inheriting two copies and expressing the recessive trait.