A cell produced by the union of gametes carrying identical alleles is called a homozygous cell.

Here's why:

* Gametes: These are sex cells (sperm and egg) that carry half the number of chromosomes of a normal cell.

* Alleles: These are alternate forms of a gene.

* Identical alleles: This means both gametes contribute the same version of a particular gene.

For example, if both gametes carry the allele for brown eyes, the resulting cell will be homozygous for brown eyes.