Saxifraga nathorstii flowers

Saxifraga nathorstii flowers

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Caption: Saxifraga nathorstii flowers, close-up. This Arctic plant is a natural hybrid between two other saxifrage species, S. oppositifolia and S. aizoides. It is a polyploid plant, having doubled the number of its chromosomes after hybridization. Such doubling allows a sterile hybrid to become fertile by permitting the correct pairing of chromosomes during meiosis (the formation of sex cells). Polyploidy is an important evolutionary mechanism as it allows the immediate formation of new species. Photographed on Clavering Island in North East Greenland National Park, Greenland.

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Keywords: arctic, botanical, botany, chromosome, chromosomes, clavering island, close-up, doubled, doubling, evolution, evolutionary, flower, flowering, flowers, genetic, genetics, hybrid, national park, nature, new species, north east greenland, plant, plants, polyploid, polyploidy, saxifraga nathorstii

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