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Arrange the following events of meiosis in correct sequence

(i) Crossing over

(ii) Synapsis

(iii) Terminalisation of chiasmata

(iv) Disappearance of nucleolus

(a) (i), (ii), (iii), (iv)

(b) (ii), (iii), (iv), (i)

(c) (ii), (i), (iv), (iii)

(d) (ii), (i), (iii), (iv)

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Ans : (d) (ii), (i), (iii), (iv)

Explanation :

Synapsis occurs during zygotene stage. Crossing over during pachytene stage and terminalisation during diakinesis. These three stages occur in prophase I and disjunction of genome, where homologous chromosomes break their connection and separate out occurs during anaphase I.

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