Q. What are Coupling and Repulsion regarded as two states of in genetics?
Answer: Linkage
Notes: Coupling and repulsion are indeed two states of linkage in genetics. Genetic linkage refers to the tendency for genes that are located close on a chromosome to be inherited together during meiosis. The compounding of genes establishes linkage. As genes become more proximal, they exhibit closer linkage. Gametes with linked genes from coupling and repulsion crosses are often combined.