Question

Which of the following statements is correct for meiosis

• A. The meiotic division has only one division of a diploid cell resulting into two haploid cells.
• B. The meiotic division has two divisions of a diploid cell resulting into four haploid cells.
• C. The meiotic division has only one division of a diploid cell resulting into two diploid cells.
• D. The meiotic division has two divisions of a haploid cell resulting into two haploid cells.

Hint:

Key Meiosis Rule:
1 DNA Replication + 2 Nuclear Divisions = 4 Haploid Cells.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Meiosis is a specialized cell division that reduces the chromosome number by half.
This process is essential for sexual reproduction and leads to the production of haploid gametes from diploid germline cells.

Step 2: Detailed Explanation:
Meiosis consists of a single round of DNA replication followed by two successive cell divisions:
Meiosis I: This is the reductional division stage. Homologous chromosomes pair up (synapsis), undergo crossing over, and segregate into two intermediate cells, reducing the ploidy from diploid ($2n$) to haploid ($1n$).
Meiosis II: This is the equational division stage. The sister chromatids of the haploid chromosomes are separated, resulting in a total of four genetically unique haploid cells.
Therefore, a single diploid cell undergoing meiosis yields four haploid gametes.

Step 3: Final Answer:
Meiosis is characterized by two successive divisions of a diploid cell, which ultimately produces four haploid daughter cells.