Question

The enzyme recombinase is used at which stage of meiosis?

• A. Zygotene of prophase I
• B. Diplotene of prophase I
• C. Anaphase I
• D. Pachytene of prophase I

Answer 1

The correct option is D Pachytene of prophase I

Recombinase is an enzyme which catalyses the exchange of genetic material during crossing over of the non-sister chromatids of the bivalent. It leads to recombination of the genetic material of the homologous chromosomes. This step occurs during the pachytene stage of prophase I of meiosis I.

In zygotene stage of prophase I of meiosis I, homologous chromosomes pair together to form the bivalent.

In diplotene stage of prophase I of meiosis I, homologous chromosomes of the bivalent start to separate from each other.

In anaphase I of meiosis I, homologous chromosomes are pulled apart to the opposite poles of the cell.