A pair of genes are linked if their recombination frequency in test cross is

A. 50%

B. 75%

C. 100%

D. Less than 50%

Answer: Option D

Solution(By Examveda Team)

A pair of genes are linked if their recombination frequency in the test cross is Less than 50%.
If the genes are far apart on a chromosome or different chromosomes, the recombination frequency is 50%.
In this case, the inheritance of alleles at the two loci is independent. If the recombination frequency is less than 50% we say the two loci are linked.