Single DNA Replication in Meiosis — NEET Biology
✅ Asked in NEET 2022Regarding meiosis, which of the statements is incorrect?
Regarding meiosis, which of the statements is incorrect?
Answer & NCERT explanation
Correct answer: B — In S phase of meiosis DNA replication occurs twice
DNA replication occurs only once during S phase before meiosis, not twice. Like mitosis, meiosis is preceded by a single S phase where DNA replicates once, creating sister chromatids. The two divisions (meiosis I and II) redistribute this replicated genetic material to produce four haploid cells. All other statements are correct: meiosis has two stages, homologous pairing and recombination occur in meiosis I, and four haploid gametes result from meiosis II.
Read more NCERT concept on the PYQ
• Meiosis involves two sequential cycles of nuclear and cell division called meiosis I and meiosis II but only a single cycle of DNA replication. • Meiosis I is initiated after the DNA replication phase. Four haploid cells are formed at the end of meiosis II. • Meiosis involves pairing of homologous chromosomes and recombination between non-sister chromatids of homologous chromosomes. • Four haploid cells are formed at the end of meiosis II. Meiotic events can be grouped under the following phases:
NTA tests students on the critical fact that meiosis involves only ONE cycle of DNA replication but TWO consecutive cell divisions (meiosis I and II). This produces four haploid cells from one diploid cell. The trap: students often confuse meiosis with mitosis or think DNA replicates before both meiosis I and II. Remember: DNA replication happens only once during S phase before meiosis I begins. After that, no more replication occurs—meiosis II is just separation of sister chromatids. This 2:1 ratio (two divisions but one replication) is fundamental to producing haploid gametes and is frequently tested in NEET through numerical problems or comparison questions.
What does NCERT say about Meiosis involves two sequential?
Has this concept appeared in NEET?
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Through deep analysis of NEET and NTA, 88 of 90 questions from the NEET 2026 paper were matched straight from the MedicNEET Biology question bank.
88/90MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.