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How does meiosis contribute to variation

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During prophase of meiosis I, the double-chromatid homologous pairs of CHROMOSOMES cross over with each other and often exchange chromosome SEGMENTS. This recombination creates genetic diversity by allowing genes from each parent to intermix, resulting in chromosomes with a different genetic complement.

The three main sources of genetic VARIATION arising from sexual reproduction are: Crossing over (in prophase I) Random assortment of chromosomes (in metaphase I) Random fusion of gametes from different parents


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