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Crossing over can only occur when two loci are on different chromosomes.

User Grandpa
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Answer:

Actually, that's not entirely accurate. Crossing over, or recombination, can occur when two loci are on the same chromosome as well as on different chromosomes.

Step-by-step explanation:

This process happens during meiosis, when homologous chromosomes pair up and exchange genetic material. This can lead to new combinations of alleles on a chromosome, increasing genetic diversity.

User Siamsot
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