Question

Arrange the following events of meiosis in correct sequence
(a) Crossing over (b) Synapsis
(q) Terminalisation of chiasmata (d) Disappearance of nucleolus.

• A. b, a, d, c
• B. b, a, c, d
• C. a, b, c, d
• D. b, c, d, a

Answer 1

The correct option is B b, a, c, d

Correct sequence $\to$ (b) Synapsis (a) crossing over (c)Terminalisation of chiasmata (d) Disappearance of nucleolus.

$\therefore b,a,c,d$

Synapsis happens in the second stage nucleolus of meiosis I.

crossing happens in the third stage pachytene of meiosis I.

Terminalisation of chiasmata makes the beginning of the final stage of meiosis I. Disappearance of nucleolus happens by the end of final stage Diakinesis of meiosis I.