Individuals have the following genotypes: EE; Ee; AaBB; AABB. which ones are heterozygous?

heterozygous organism – in which in the genotype of a pair of genes, one is dominant, and the other is recessive.
hence Ee and AaBB



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.