NEET 2019 · Class 11

Cell Cycle and Cell Division

Crossing over takes place between which chromatids and in which stage of the cell cycle? [OD NEET 2019]

  1. (A)Non-sister chromatids of non-homologous chromosomes at Pachytene stage of prophase I.
  2. (B)Non-sister chromatids of non-homologous chromosomes at Zygotene stage of prophase I.
  3. (C)Non-sister chromatids of homologous chromosomes at Pachytene stage of prophase I.
  4. (D)Non-sister chromatids of homologous chromosomes at Zygotene stage of prophase I.

The NCERT line that answers it

Verbatim line

This stage is characterised by the appearance of recombination nodules, the sites at which crossing over occurs between non-sister chromatids of the homologous chromosomes.

Chapter
Cell Cycle and Cell Division
Section
10.4.1 Meiosis I
Page
6
Words matched
36 of 36

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states that crossing over occurs between non-sister chromatids of homologous chromosomes at the pachytene stage, which directly matches option C and distinguishes it from all other options.

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