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Cell Cycle and Cell Division question

2016 · Q38
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Cell Cycle and Cell Division question

2016 · Q38

NEETBiologyCell Cycle and Cell DivisionMCQ+4 / −1
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{\rm I}I Column I{\rm I}II{\rm I}I
A. Pachytene (i) Pairing of homologous
chromosomes
B. Metaphase I{\rm I}I (ii) Terminalisation of
chiasmata
C. Diakinesis (iii) Crossing-over takes
place
D. Zygotene (iv) Chromosomes align
at equatorial plate
  1. A
    (A) - (iii);  (B) - (iv);  (C) - (ii);  (D) - (i)
  2. B
    (A) - (i);  (B) - (iv);  (C) - (ii);  (D) - (iii)
  3. C
    (A) - (ii);  (B) - (iv);  (C) - (iii);  (D) - (i)
  4. D
    (A) - (iv);  (B) - (iii);  (C) - (ii);  (D) - (i)
View written solutionFree

Correct answer: A

To match the stages of meiosis in Column I with their characteristic features in Column II, we need to understand each stage and its key features :

  1. Pachytene (A): This is a stage in Prophase I of meiosis where crossing-over takes place. Homologous chromosomes are already paired, and genetic recombination occurs.
  2. Metaphase I (B): At this stage, chromosomes align at the equatorial plate. This is a characteristic feature of metaphase in both mitosis and meiosis.
  3. Diakinesis (C): This is the final stage of Prophase I in meiosis. During diakinesis, terminalisation of chiasmata occurs, which means that the chiasmata move to the ends of the chromatids.
  4. Zygotene (D): This stage is characterized by the pairing (synapsis) of homologous chromosomes. It's one of the early stages of Prophase I in meiosis.

Based on this understanding, the matches would be:

  • A (Pachytene) with (iii) Crossing-over takes place.
  • B (Metaphase I) with (iv) Chromosomes align at the equatorial plate.
  • C (Diakinesis) with (ii) Terminalisation of chiasmata.
  • D (Zygotene) with (i) Pairing of homologous chromosomes.
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