Anaphase I is characterised by

Options

A. Alignment of chromosomes on equatorial plate.
B. Reappearance of nucleolus nuclear membrane
C. Separation of homologous chromosomes.
D. Terminalisation of chasmata

Answer

**Step-by-Step Text Solution:**

1. **Understanding Anaphase I**: Anaphase I is a stage in meiosis, specifically during Meiosis I. It follows Metaphase I and precedes Telophase I.

2. **Identifying the Characteristics**: To determine what Anaphase I is characterized by, we need to analyze the options given.

3. **Evaluating Option A**: Option A states "alignment of chromosomes on equatorial plates." This characteristic is associated with Metaphase I, not Anaphase I. Therefore, this option is incorrect.

4. **Evaluating Option B**: Option B mentions "reappearance of nucleolus and nuclear membrane." This event occurs during Telophase I, not Anaphase I. Thus, this option is also incorrect.

5. **Evaluating Option C**: Option C states "separation of homologous chromosomes." This is indeed the defining characteristic of Anaphase I. During this phase, homologous chromosomes are pulled apart and move toward opposite poles of the cell.

6. **Evaluating Option D**: Option D mentions "terminalization of chiasmata." This process occurs during the Diplotene stage of Prophase I, not Anaphase I. Therefore, this option is incorrect.

7. **Conclusion**: The correct answer is Option C, which states that Anaphase I is characterized by the separation of homologous chromosomes.

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