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I. It is the final phase of prophase I ...

I. It is the final phase of prophase I
II. Termination of chiasmata occurs
III. Fully condensed chromosomes
IV. Spindle is assembled
V. Nucleolus and NM breaks down
The above characteristic are attributed to -

A

Zygotene

B

Diakinesis

C

Diplotene

D

Metaphase I

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the characteristics attributed to a specific phase of prophase I, we will analyze each statement step by step. ### Step-by-Step Solution: 1. **Identify the Phase**: The question states that it is the final phase of prophase I. In meiosis, prophase I consists of several stages: Leptotene, Zygotene, Pachytene, Diplotene, and finally Diakinesis. Therefore, we can conclude that the phase in question is Diakinesis. 2. **Termination of Chiasmata**: During Diakinesis, the chiasmata (the points where homologous chromosomes exchange genetic material) begin to separate. This is a key feature of this phase, confirming that the statement is accurate. 3. **Fully Condensed Chromosomes**: In Diakinesis, chromosomes are fully condensed and visible under a microscope. This characteristic is also true for this phase. 4. **Spindle Assembly**: The assembly of the spindle apparatus occurs during Diakinesis as the cell prepares for metaphase. This characteristic is consistent with the features of Diakinesis. 5. **Breakdown of Nucleolus and Nuclear Membrane**: During Diakinesis, the nucleolus disappears, and the nuclear membrane breaks down, allowing the spindle fibers to attach to the chromosomes. This characteristic is also true for this phase. ### Conclusion: All the characteristics listed in the question are indeed attributed to **Diakinesis**, which is the final phase of prophase I in meiosis. ### Final Answer: The above characteristics are attributed to **Diakinesis**. ---
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