Select correct sequence of substages of Prophase-I of Meiotic division :
(A) Zygotene
(B) Pachytene
(C) Diakinesis
(D) Leptotene
(E) Diplotene
Choose the correct answer from the options given below :

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(D), (B), (A), (E), (C)

(A), (B), (D), (E), (C)

(D), (A), (B), (E), (C)

(A), (D), (B), (C), (E)

answer is C.

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Detailed Solution

The correct sequence is D, A, B, E, C.
The correct sequence of substages of prophase I of meiotic division are as follows:
D. Leptotene - During this substage, chromosomes condense and become visible as long, thin threads.
A. Zygotene - Homologous chromosomes pair up via a protein ladder called synaptonemal complex.
Paired homologs appear as bivalents initially and later as tetrads.
B. Pachytene - Crossing over occurs between paired homologous chromosomes, resulting in the
exchange of genetic material (recombination).
E. Diplotene - The synaptonemal complexes partially dissolve, and paired homologous chromosomes
start to separate. However, they remain connected at points called chiasmata, where crossing over occurred.
C. Diakinesis - Terminalisation of chromosomes takes place at this stage.
(1), (2), (4) are incorrect sequences.

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