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Crossing over occurs when

Asister chromatids are pulled apart at the centromere during anaphase II.

Bhomologous chromosomes join together to form tetrads during prophase I.

Cchromosomes are grouped together into new nuclei during telophase II.

Dtetrads of homologous chromosomes randomly line up in metaphase I.

Verified Answer :

BCrossing over occurs when homologous chromosomes pair up and exchange genetic material at the chiasmata (site of exchange).

B. homologous chromosomes join together to form tetrads during prophase I.


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