Coupling and repulsion are the two states of : A)linkage B)chiasma C)mutation D)crossing over
Option A) Genetic linkage is the tendency of genes that are located proximal to each other on a chromosome to be inherited together during meiosis. The figure below depicts the gamete composition for linked genes from coupling and repulsion crosses:
In coupling, dominant alleles are present on the same chromosome and recessive alleles are present on the same chromosome. In repulsion, dominant alleles of some genes and recessive alleles of some genes are present on the same chromosome. Coupling and Repulsion are two faces of crossing over and linkage as when two genes are present on the same chromosome, they are linked and so, crossing over cannot occur.
In coupling, dominant alleles are present on the same chromosome and recessive alleles are present on the same chromosome. In repulsion, dominant alleles of some genes and recessive alleles of some genes are present on the same chromosome. Coupling and Repulsion are two faces of crossing over and linkage as when two genes are present on the same chromosome, they are linked and so, crossing over cannot occur.
option C
