Which is unique to meiosis and does not occur in mitosis?

Homologous chromosomes cross over

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Homologous chromosomes pair and form bivalents

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Homologous chromosomes behave independently

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Chromatids are separated during anaphase

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Solution

The correct option is A Homologous chromosomes cross over
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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