C. AA represents a homozygous genotype.In genetics, a homozygous genotype means that an organism has two identical alleles, one from the mother and one for the father. Two type of homozygous genotypesHomozygous dominant – both alleles from both parents are in capital letters, like AA or BBHomozygous recessive – both alleles from both parents are in lowercase, such as aa or bbExample of homozygous genotypeAAaa BBbbOn the other hand, a heterozygous genotype means the organism has different alleles.Example of heterozygous genotypeAaBbDd