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  • Polyploidy is important in the origin of new plant species and has caused some species to have an astoundingly large number of chromosomes. This photograph is a
    Michael Windham
    Polyploidy is important in the origin of new plant species and has caused some species to have an astoundingly large number of chromosomes. This photograph is a "chromosome squash" of a hexaploid (six genome copies) fern species of the genus Cystopteris. This species has 126 pairs of chromosomes.
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