Question

The process of crossing over is assisted by which of the following enzymes?

• A. Endonuclease
• B. Polymerase
• C. Ligase
• D. All of the above
  

Answer 1

Answer: (D)

All of the above

Crossing over is the exchange of DNA segments between non-sister chromatids of homologous chromosomes. Endonuclease is responsible for breakage of 2 non-sister chromatids which is followed by the exchange of segments. Exchanged segments are joined by ligase enzyme. DNA polymerase is also used during recombination.

So, the correct option is 'All of the above'.