Homozygous organism: AA, BB, AACC
Heterozygous organism: Bb, AaCc
Heterozygous organism for the dominant trait: Aavv is also homozygous for the recessive trait.
If there are different alleles of the same gene, then it is a heterozygous organism. For example, Bb is denoted by different letters. If the alleles of the same gene are the same, it is homozygous. For example, AA is two large identical letters, it is also possible variant aa, homozygous, but recessive. Each organism has its own genotype and its own set of qualities and traits.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.