The adder's-tongue fern Ophioglossum reticulatum has about 1,440 chromosomes (2n) in its sporophyte cells, the highest chromosome number known for any organism - over 30 times the human count of 46. Its extreme count results from repeated rounds of polyploidy.
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The adder's-tongue fern Ophioglossum reticulatum has about 1,440 chromosomes (2n) in its sporophyte cells, the highest chromosome number known for any organism - over 30 times the human count of 46. Its extreme count results from repeated rounds of polyploidy.
The highest chromosome number counted in any known organism.
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Current frontiers derived from accepted Claims.
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The frontier as it changed over time.
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1 accepted Claim, with 1 linked evidence records.
Permanent ID limitsregistry.com/limits/LR-MOST-CHROMOSOMES-ANY-ORGANISM-ADDERS-TONGUE-FERN
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Limits Registry. LR-MOST-CHROMOSOMES-ANY-ORGANISM-ADDERS-TONGUE-FERN. Highest chromosome number of any organism. 2026.