Question

The frequency of crossing over would be higher if

• A. Two genes are located closely
• B. Two genes are far apart on a chromosome
• C. Two genes are not located on the same chromosome
• D. None of the above

Answer 1

Answer: (B)

Two genes are far apart on a chromosome

In genetics, complete linkage is defined as the state in which two loci are so close together that alleles of these loci are virtually never separated by crossing over. The closer the physical location of two genes on the DNA, the less likely they are to be separated by a crossing-over event and vice versa.

So, the correct answer is 'Two genes are far apart on a chromosome'.