Assertion :- In anaphase number of chromosomes get doubled.
Durring anaphase each chromosome split simultaneously and two daughter chromatids now referred to as chromosomes.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are false.

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that "In anaphase, the number of chromosomes gets doubled." This implies that during the anaphase stage of cell division, the total count of chromosomes in the cell increases.

2. **Analyzing the Assertion**: This assertion is incorrect. The doubling of chromosomes occurs during the S phase (Synthesis phase) of the cell cycle, not during anaphase. During the S phase, each chromosome is replicated, resulting in two identical sister chromatids for each chromosome.

3. **Understanding Anaphase**: Anaphase is a stage in both mitosis and meiosis where the sister chromatids are pulled apart towards opposite poles of the cell. Each sister chromatid is considered a separate chromosome once they are separated.

4. **Analyzing the Reason**: The reason states that "During anaphase, each chromosome splits simultaneously, and two daughter chromatids are now referred to as chromosomes." While it is true that during anaphase, the sister chromatids separate, the statement that they are referred to as chromosomes is misleading. After separation, they are indeed called chromosomes, but they were originally sister chromatids before separation.

5. **Conclusion**: Both the assertion and the reason are incorrect. The assertion is wrong because chromosome doubling occurs in the S phase, not anaphase. The reason is misleading as it does not accurately describe the terminology and the process occurring during anaphase.

**Final Answer**: Both the assertion and the reason are false.

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