Question

Which of the following creates maximum variation?

• A. Single crossing over
• B. Multiple crossing over
• C. Double crossing over
• D. Both A and B

Answer 1

The correct option is A Single crossing over

Crossing over is a process of exchange of genetic materials or segments between non-sister chromatids of homologous chromosomes. Crossing over occurs in pachytene stage of prophase I of meiosis during a process called synapsis. Hence, crossing over is one of the final stages of genetic recombination. when one segment is crossed over the maximum amount of changes or variation focus.

So, the correct option is 'Single crossing over'