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

Answer 1

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.