Which chromosome remains condense during interphase :-

Options

A. Normal X – chromosome
B. X - chromosome of Bar body
C. Autosomes
D. Allosomes

Answer

To answer the question "Which chromosome remains condensed during interphase?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Interphase**: Interphase is the phase of the cell cycle where the cell prepares for division. During this time, chromosomes typically decondense to allow for DNA replication and gene expression.

2. **Evaluating the Options**:
- **Option 1: Normal X Chromosome**: The normal X chromosome is usually decondensed during interphase. Therefore, this option is incorrect.
- **Option 2: X Chromosome of the Bar Body**: The X chromosome in the Bar body (which is an inactive X chromosome in females) remains condensed during interphase. This is the correct answer.
- **Option 3: Autosomes**: Autosomes are the non-sex chromosomes and are typically decondensed during interphase. Thus, this option is also incorrect.
- **Option 4: Allosomes**: Allosomes refer to sex chromosomes (X and Y). In females, both X chromosomes are usually decondensed, and in males, the X and Y chromosomes are also decondensed during interphase. Hence, this option is incorrect.

3. **Conclusion**: The only chromosome that remains condensed during interphase is the X chromosome of the Bar body, which is inactive.

### Final Answer:
The chromosome that remains condensed during interphase is the **X chromosome of the Bar body**.

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