Explanation
An organism with two identical alleles is said to be homozygous.
Homozygosity refers to the condition in which an individual has two copies of the same allele for a particular gene. The alleles may be either dominant or recessive, but in either case, they are the same. For example, an organism that has two copies of the dominant allele for a given gene (e.g., AA) is homozygous dominant, while an organism that has two copies of the recessive allele (e.g., aa) is homozygous recessive.
Therefore, option C (Homozygous) is the correct answer. Option A (Dominant) refers to an allele that is expressed over another allele in a heterozygous individual.
Option B (Hybrid) is a term used to describe an individual that is the offspring of two genetically different parents.
Option D (Heterozygous) refers to an individual that has two different alleles for a particular gene.
