________of a non-dividing nucleus, condenses in a dividing nucleus to form chromosomes

Options

A. Centrosomes
B. Chromatin
C. Chromosomes
D. DNA

Answer

To solve the question, we need to identify what condenses in a dividing nucleus to form chromosomes. Here’s the step-by-step solution:

1. **Understanding the Nucleus**: In a non-dividing cell, the genetic material is present in a form that is not tightly packed. This form is crucial for the cell's normal functions, such as gene expression.

2. **Identifying the Structure**: The genetic material in a non-dividing nucleus is known as chromatin. Chromatin consists of DNA wrapped around proteins called histones, which help in packaging the DNA into a more compact structure.

3. **Process of Cell Division**: When a cell is preparing to divide, it undergoes a process where the chromatin condenses. This condensation is necessary to ensure that the genetic material is accurately distributed to the daughter cells during cell division.

4. **Formation of Chromosomes**: As the chromatin condenses, it forms distinct structures known as chromosomes. Each chromosome is made up of a single, long DNA molecule that has been tightly coiled and packed.

5. **Conclusion**: Therefore, the correct answer to the question is "chromatin," as it is the structure that condenses to form chromosomes during cell division.

Final Answer: **Chromatin**

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