Here's why:

* Dominance and Recessiveness are Properties of Alleles, not Parents: Dominant and recessive traits are determined by the specific versions of genes, called alleles, that an individual inherits from their parents. It's not about the father's genes being inherently dominant.

* Both Parents Contribute Equally: Each parent contributes one allele for each gene. Whether a trait is expressed depends on the combination of alleles the child inherits.

* Equal Chance of Inheritance: A child has an equal chance of inheriting any specific allele from either parent.

* Exceptions Exist: While some traits might appear more common in one sex, this is often due to environmental factors or hormonal influences, not because the father's genes are always dominant.

Example:

Let's say eye color is determined by a single gene with two alleles: brown (B) and blue (b).

* Father: Bb (brown eyes)

* Mother: bb (blue eyes)

The child has a 50% chance of inheriting the brown allele (B) from the father and a 50% chance of inheriting the blue allele (b) from the mother.

* Possible Genotypes:

* BB: Brown eyes (dominant)

* Bb: Brown eyes (dominant)

* bb: Blue eyes (recessive)

In this case, even though the father carries the dominant brown allele, the child still has a chance of inheriting blue eyes if they inherit the recessive blue allele from both parents.

In short, the father's genes are not inherently dominant. The dominance of a trait depends on the specific alleles inherited from both parents.