Question

What happens in diakinesis of prophase I?

Answer 1

Prophase of Mitosis:

1. During prophase, chromosomes condense into the X-shaped structures.
2. Each chromosome comprises two sister chromatids that have identical information.
3. Chromosomes pair up so that both the copies of chromosome 1 are together and both copies of chromosome 2 are grouped and so on.
4. The membrane surrounding the nucleus at the end of the prophase dissolves away which releases chromosomes.
5. The mitotic spindle expands across cells between centrioles as they drift to opposite poles of the cell.

Diakinesis:

1. Diakinesis is the stage of Prophase I that marks the disappearance of the nuclear envelope around the cell.
2. At this stage, the nucleolus, the nuclear membrane of the cell starts to disappear, and the appearance of fully compact homologous chromosomes is seen.
3. It is characterized by the terminalisation of chiasmata and represents the transition to the next phase of the cell cycle.