NEET Biology question

Read the given characteristics of stage 'X' of meiosis. (i) Chromosomes are paired and occur in synaptonemal complex. (ii) Recombination nodules are seen. (iii) Crossing over takes place.

Which of the following represents stage 'X'?

(A)Chromosomes shown aligned in a single row at the cell's equator with spindle fibres from both poles
(B)Chromosomes shown as two separate groups of V/L-shaped rods moving toward opposite poles
(C)Chromosomes shown as several short rod-pairs arranged loosely around the nuclear periphery
(D)Chromosomes shown as a few thick, tightly intertwined paired threads occupying the centre of the nucleusCorrect

Answer: (D)

Solution

All three listed features — synapsed chromosomes held in a synaptonemal complex, visible recombination nodules, and active crossing over — are hallmarks of pachytene. Of the given depictions, the one showing

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Question ID VK-127435