genetics, the study of heredity. The understanding of the inheritance of blood group antigens and the testing for disease markers at the molecular level,
classic genetics
Mendel’s laws of inheritance and Hardy-Weinberg formulas,
Mendel’s first law shows that alleles of genes have no permanent effect on one another when present in the same plant but segregate unchanged by passing into different gametes.
Codominance means that neither allele can mask the expression of
the other allele.