Homozygous

Imagine you're trying to decide what to wear for the day, and you find two identical blue shirts in your closet. This situation is similar to the concept of being homozygous, where an individual has two identical alleles for a specific trait. Just like having two of the same blue shirts provides a consistent choice in your wardrobe, having two identical alleles (homozygous) ensures a consistent expression of a trait in an organism.
Practice Version

Homozygous: Two identical alleles for a trait. Homozygous. When an organism has two of the same versions of a gene, it is called homozygous.