Reductional division involves

Options

A. Splitting of centromere
B. Separation of sister chromatids
C. Formation of single metaphasic plate
D. None of the above

Answer

**Step-by-Step Solution:**

1. **Understanding Reductional Division**: Reductional division refers to the process that occurs during meiosis, specifically in meiosis I. It is characterized by the reduction of the chromosome number from diploid (2n) to haploid (n).

2. **Meiosis Overview**: Meiosis consists of two main stages: meiosis I and meiosis II. In meiosis I, homologous chromosomes are separated, leading to a reduction in chromosome number. This is where reductional division occurs.

3. **Chromosome Behavior in Meiosis I**: During meiosis I, homologous chromosomes pair up and then separate. This separation does not involve splitting of centromeres, which occurs in meiosis II when sister chromatids are separated.

4. **Analyzing the Options**:
- **Splitting of Centromere**: This occurs in meiosis II, not in reductional division (meiosis I).
- **Separation of Sister Chromatids**: This also occurs in meiosis II, not in meiosis I.
- **Formation of Single Metaphysic Plate**: This is not a characteristic of reductional division; instead, it refers to the alignment of chromosomes during metaphase.

5. **Conclusion**: Since none of the provided options correctly describe the process involved in reductional division, the correct answer is "none of the above."

**Final Answer**: Reductional division involves none of the above options.

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