What organisms are called homozygous for some reason?

Homozygosity (from the Greek. “Homo” equal, “zygote” fertilized egg) diploid organism (or cell), carrying identical alleles in homologous chromosomes.
Gregor Mendel was the first to establish a fact that indicates that plants similar in appearance can dramatically differ in hereditary properties. Individuals that do not split in the next generation are called homozygous. Individuals in the offspring in which a splitting of characters is detected was called heterozygous.

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