Question

Coupling and repulsion hypothesis was given by

• A. Bateson and Morgan
• B. Morgan and Punnet
• C. Bateson and Punnet
• D. Morgan and Miller

Answer 1

The correct option is C Bateson and Punnet

Bateson explained the lack of independent assortment by means of a hypothesis known as coupling and repulsion hypothesis. Although coupling and repulsion were discovered later to be the aspects of same phenomenon. It is called as linkage, the terms coupling phase and repulsion phase are still considered to be useful terms in scientific literature. Bateson and Punnet proposed that the F${}_1$ had actually produced more dominant and recessive gametes in sweet pea cross than would be produced by Mendelian independent assortment. Because these genotypes were the gametic types in the original pure lines, the researchers thought that physical coupling between the dominant alleles P and L and between the recessive alleles p and l might have prevented their independent assortment in the F${}_1$. However, they did not know what the nature of this coupling could be.