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Chemistry LibreTexts

Meiosis and Genetic Variation

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  • crossingover_5734a1d814c00.jpg

    Sexual reproduction creates a vast array of combinations of genes. 

    Crossing over is the exchange of chromosome segments between homologous chromosomes. This occurs during prophase I of meiosis I. This process results in entirely new combinations of genes. 

    Watch this video on meiosis and crossing over, and review the image at the right.