Choose the incorrect ones w.r.t. metaphase.
Each chromosome with two sister chromatids.
Best stage to study morphology of chromosomes.
Spindle fibres are attached to kinetochore.
Each chromatid attaches to two spindle fibres from either poles.
Dissolution of kinetochore.

Options

A. A & D Only
B. B, D & E Only
C. D & F Only
D. A, D & F Only

Answer

To solve the question regarding the incorrect statements about metaphase, we will analyze each statement one by one.

1. **Each chromosome with two sister chromatids.**
- During metaphase, each chromosome is indeed composed of two sister chromatids that are joined at the centromere. This statement is **correct**.

2. **Best stage to study morphology of chromosomes.**
- Metaphase is considered the best stage to study the morphology of chromosomes because they are highly condensed and aligned at the metaphase plate. This statement is **correct**.

3. **Spindle fibres are attached to kinetochore.**
- During metaphase, spindle fibers attach to the kinetochores of the chromosomes, which is essential for their movement during cell division. This statement is **correct**.

4. **Each chromatid attaches to two spindle fibres from either poles.**
- This statement is **incorrect**. In metaphase, each chromatid is attached to one spindle fiber from one pole and another spindle fiber from the opposite pole, but not two from each pole. Each chromatid has a single attachment to a spindle fiber from each pole, allowing for proper separation during anaphase.

5. **Dissolution of kinetochore.**
- The dissolution of the kinetochore does not occur during metaphase; it happens later during anaphase when the sister chromatids are pulled apart. Therefore, this statement is also **incorrect**.

Now, summarizing our findings:
- The incorrect statements are:
- **Each chromatid attaches to two spindle fibres from either poles.** (Option D)
- **Dissolution of kinetochore.** (Option E)

However, since the question asks for the incorrect ones, we focus on the most clearly incorrect statement regarding spindle fiber attachment.

**Final Answer:**
The incorrect statement with respect to metaphase is: **Each chromatid attaches to two spindle fibres from either poles.** (Option D)

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