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Question

Match the stages of meiosis in Column-I to their characteristic features in Column-II and select the correct option using the codes given below:
Column I Column II

a. Pachytene 1. Pairing of homologous chromosomes
b. Metaphase I 2. Terminalization of chiasmata
c. Diakinesis 3. Crossing-over takes place
d. Zygotene 4. Chromosomes align at equatorial plate

A
a-4, b-3, c-2. d-1
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B
a-3, b-4, c-2, d-1
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C
a-1,b-4, c-2, d-3
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D
a-2, b-4, c-3, d-1
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Solution

The correct option is B a-3, b-4, c-2, d-1
Prophase I of meiosis I includes five phases: Leptotene, Zygotene, Pachytene, Diplotene and Diakinesis.
  • Zygotene - Pairing of homologous chromosomes
  • Pachytene - Crossing-over takes place
  • Diakinesis - Terminalisation of chiasmata
The metaphase I of meiosis I encompasses the alignment of paired chromosomes along the centre (metaphase plate) of a cell. Metaphase I follows prophase I and precedes anaphase I.

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