Dictyokinesis is

Options

A. Production and segregation of chromosomes during mitosis
B. Breaking up of Golgi apparatus
C. Movement of chromosomes during karyokinesis
D. Breaking of nuclear envelope

Answer

### Step-by-Step Solution:

1. **Understanding the Term "Dictyokinesis":**
- The term "Dictyokinesis" is derived from "Dictyo," which refers to Dictyosomes. Dictyosomes are smaller versions of the Golgi apparatus found in plant cells.

2. **Role of Dictyosomes:**
- During the onset of prophase in mitosis or meiosis, Dictyosomes play a crucial role. They release enzymes that are involved in the breakdown of various cellular structures.

3. **Processes Involved:**
- The enzymes released by Dictyosomes lead to the breakdown of the nuclear envelope and other organelles, including the Dictyosomes themselves.

4. **Analyzing the Options:**
- **Option 1:** Production and segregation of chromosomes during mitosis - This occurs during the anaphase, so it is incorrect.
- **Option 2:** Breaking up of Golgi apparatus - This is the correct answer, as it directly relates to the function of Dictyosomes during prophase.
- **Option 3:** Movement of chromosomes during karyokinesis - This occurs during telophase, making it incorrect.
- **Option 4:** Breaking of nuclear envelope - While this does occur during prophase, it is not specifically referred to as Dictyokinesis.

5. **Conclusion:**
- The correct answer to the question "Dictyokinesis is" is **Option 2: breaking up of Golgi apparatus**.