Question

During meiosis, replication of DNA occurs in

• A. S-phase
• B. S-phase and zygotene
• C. S-phase and leptotene
• D. All the above

Answer 1

Answer: (A)

S-phase

S phase is recognised by the synthesis of DNA. It doubles the DNA content of the cell and occurs between G${}_1$ and G${}_2$ phase. Zygotene and Leptotene are the stages of prophase I and are associated with crossing-over and recombination.
So, the correct answer is 'S-phase'.