Define crossing over?

1.	Define crossing over?
Answer» Crossing over\xa0is the swapping of genetic material that occurs in the germ line. During the formation of egg and sperm cells, also known as meiosis, paired chromosomes from each parent align so that similar DNA sequences from the paired chromosomes cross\xa0over\xa0one another.\xa0Crossing over occurs\xa0between prophase I and metaphase I and is the process where two homologous non-sister chromatids pair up with each other and exchange different segments of genetic material to form two recombinant chromosome sister chromatids.

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