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NTA Abhyas NEET2020BotanyCell Cycle and Cell DivisionPractice

Crossing over occurs between ________chromatid of _______chromosome.

Options

  1. ASister, homologous
  2. BNon-sister, homologous
  3. CNon-sister, non homologous
  4. DSister, homologous

Correct answer

B. Non-sister, homologous

Step-by-step solution

Crossing over is the exchange of chromosomal segment between non-sister chromatids of homologous chromosomes. It occurs during pachytene of prophase-I of meiosis, and it results in recombination of genes, producing genetic variation. It is carried out by enzyme recombinase.

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