Which of the following describes the condition of being "homozygous recessive"?

The condition of being "homozygous recessive" refers to having two identical alleles for a specific gene, and both alleles are recessive. In genetics, alleles are different versions of a gene that can exist at a specific locus on a chromosome.

When an individual is homozygous recessive, they carry two copies of the recessive allele, which is typically denoted as "aa". This means that they express the recessive trait associated with that gene, as there are no dominant alleles present to mask the effect of the recessive ones. In contrast, having one or two dominant alleles (as in the options with "AA" or "Aa") would not qualify as homozygous recessive because those configurations include at least one dominant allele that dictates the phenotype.

Thus, "aa" is the only choice that accurately describes the homozygous recessive condition, where the organism will exhibit the traits linked to the recessive alleles.