Aa x aa
In order to establish the “purity” of the body, an analyzing cross is performed, in which the studied individual with dominant traits is crossed with a recessive homozygous (aa). If the offspring from such a cross appears homogeneous, then the individual is homozygous (its genotype AA). If in the offspring there will be 50% of individuals with dominant characters, and 50% with recessive ones, then the individual is heterozygous (its genotype Aa).
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.