In pachytene stage, recombination occurs between A Two non-sister chromatids B Two homologous chromosomes C Two non-homologous chromosomes D Both A and B
Correct option is B) Pachytene is the third stage of prophase 1 of meiosis. During this stage, each chromosome pair separates into sister chromatids and crossing over of genes occurs. Crossing over is also called synapsis and is is one of the final stages of genetic recombination. It is the process of exchange of genetic materials or segments between non-sister chromatids of homologous chromosomes. So, the correct answer is 'Two homologous chromosomes'.
