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 in the same chromosome.
• D. None of the above

Answer 1

The correct option is C Two genes are not located in the same chromosome.

The frequency of crossing over between two genes present on the same chromosome (linked gene) is directly proportional to the distance between genes. When the two genes are not located in the same chromosomes (unlinked genes), they are independently assorted during cell division. So the frequency of crossing over is high.