Question

Coupling and repulsion are the two faces of

• A. Crossing over
• B. Linkage
• C. Both A and B
• D. Mutation

Answer 1

The correct option is C Both A and B

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.

So, the correct answer is 'Both A and B'.