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Re:Tiny fern has the largest genome of any organism on Earth by samatman on Saturday June 08, 2024 @03:12PM (#40619596)
> In contrast, gene duplication at a large scale in any animal would probably fundamentally mess up body plan development in non-survivable ways.

While unusual, polyploidy in mammals is survivable, there's a species which is tetraploid:

https://en.wikipedia.org/wiki/Plains_viscacha_rat

The wiki exaggerates the degree to which this claim is controversial, fwiw. Better than the alternative, probably.

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