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Question

Which is unique to meiosis and does not occur in mitosis?
  1. Homologous chromosomes cross over
  2. Homologous chromosomes pair and form bivalents
  3. Homologous chromosomes behave independently
  4. Chromatids are separated during anaphase

A
Homologous chromosomes pair and form bivalents
B
Homologous chromosomes behave independently
C
Homologous chromosomes cross over
D
Chromatids are separated during anaphase
Solution
Verified by Toppr

In meiosis , synapsis (Pairing of homologous chromosome), Crossing over (exchange of chromosomal segment between nos sister chromatids) occurs which does not occur in mitosis.
Also meiosis is reductional division , the chromosomal number during meiosis is reduced to half while no such reduction in chromosomal number occurs during mitosis.
Hence answer is 'Homologous chromosomes cross over'

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