Question

Recombination is caused by

• A. Crosssing over alone
• B. Crosssing over and independent assortment
• C. independent assortment only
• D. Chiasma formation

Answer 1

Answer: (A)

Crosssing over alone

Recombination during meiosis is caused by crossing over. The homologous chromosomes pair and cross over at points known as the chiasmata. The chiasma breaks and the broken chromosome segments get switched onto homologous chromosomes leading to recombination.

So, the correct option is 'Crossing over alone'.