Complete the graphic organizer to define the characteristics of homozygous and heterozygous genotypes and phenotypes.

Heterozygous means that an organism has two different alleles of a gene. Homozygous means that the organism has two copies of the same allele for a gene. An organism's genotype is its specific combination of alleles for a given gene. The phenotype is the physical manifestation of an organism's allellic combination (also known as genotype).