Question

Which is the following is true about diakinesis :
1) Chromosomes a pole uncoil and form chromatin reticulum
2) Exchange of chromosome segments between two non-sister chromatids of homologous pair of chromosomes
3)Chromosomes are joined only at their ends and appear like a ring.
4)Synaptonemal complex starts breaking down.

ANSWER:

Answer 1

1) Chromosomes a pole uncoil and form chromatin reticulum

Answer 2

Among these the true about diakinesis (1) Chromosomes a pole uncoil and form chromatin reticulum

Explanation:

1.At the diakinesis stage, the chiasmata disappear.This results in the formation of a meiotic spindle between the homologous chromosomes.The tetrad gravitates at the center towards the equatorial metaphase plate.After the diakinesis the cell enters the Metaphase of meiosis.

2.The final stage of prophase I of meiosis I in which the chromosomes condense, during which homologous chromosomes start to separate after crossing over.

3.The final stage of the prophase in meiosis, characterized by shortening and thickening of the paired chromosomes, formation of the spindle fibers, disappearance of the nucleolus, and degeneration of the nuclear membrane.