Question:
Identify the wrong statement about meiosis
Identify the wrong statement about meiosis
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Meiosis involves: One round of DNA replication + Two rounds of cell division = Reduction in chromosome number.
Updated On: Jul 13, 2026
- Pairing of homologous chromosomes occur
- Four haploid cells are formed
- Chromosome number is reduced by half
- Two cycles of DNA replication occurs
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Meiosis is a specialized form of cell division that reduces the chromosome number by half, producing four genetically diverse haploid daughter cells.
Step 2: Detailed Explanation:
- (A) is correct because homologous chromosomes pair up (synapsis) to form bivalents during prophase I, which allows crossing over to occur.
- (B) and (C) are correct because a diploid cell (\(2n\)) undergoes two successive nuclear divisions (Meiosis I and Meiosis II), resulting in four haploid cells (\(n\)), each with half the chromosome number of the parent cell.
- (D) is incorrect because meiosis includes only a single cycle of DNA replication, which occurs during the S phase of interphase before meiosis I begins. No DNA replication occurs during interkinesis between meiosis I and meiosis II.
If DNA replicated twice, the reduction in chromosome number would not occur.
Step 3: Final Answer:
The incorrect statement is that two cycles of DNA replication occur during meiosis.
Meiosis is a specialized form of cell division that reduces the chromosome number by half, producing four genetically diverse haploid daughter cells.
Step 2: Detailed Explanation:
- (A) is correct because homologous chromosomes pair up (synapsis) to form bivalents during prophase I, which allows crossing over to occur.
- (B) and (C) are correct because a diploid cell (\(2n\)) undergoes two successive nuclear divisions (Meiosis I and Meiosis II), resulting in four haploid cells (\(n\)), each with half the chromosome number of the parent cell.
- (D) is incorrect because meiosis includes only a single cycle of DNA replication, which occurs during the S phase of interphase before meiosis I begins. No DNA replication occurs during interkinesis between meiosis I and meiosis II.
If DNA replicated twice, the reduction in chromosome number would not occur.
Step 3: Final Answer:
The incorrect statement is that two cycles of DNA replication occur during meiosis.
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