Question

State whether the following statement is true or false.

Each chiasma is equivalent to 1% crossing over.

Answer 1

This statement is false.

Explanation:

Each chiasma refers to a physical point of contact and exchange between non-sister chromatids during crossing over in meiosis, but it does not correspond exactly to 1% recombination frequency. The relationship between chiasmata and crossing over frequency is more complex, and the frequency of crossing over depends on factors such as the distance between genes on a chromosome, not a fixed 1% per chiasma. Thus, the idea that each single chiasma equals exactly 1% crossing over is incorrect.