When both parents contribute to a gene pair that is recessive, it is referred to as homozygous recessive.

Here's a breakdown:

* Homozygous: Means having two identical alleles (versions of a gene) for a particular trait.

* Recessive: Means that the trait will only be expressed if two copies of the recessive allele are present.

Example:

Let's say the gene for eye color has two alleles: brown (B) and blue (b).

* BB: Homozygous dominant (brown eyes)

* Bb: Heterozygous (brown eyes, as brown is dominant)

* bb: Homozygous recessive (blue eyes)

Therefore, when both parents contribute a "b" allele, resulting in a "bb" genotype, their child will have blue eyes.