Birds use a tiny RNA fragment to balance sex chromosomes

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2025-07-16 15:26:14 -

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Nature, Published online: 16 July 2025; doi:10.1038/d41586-025-02208-3Birds use a unique mechanism to balance gene expression from their sex chromosomes. MiR-2954 is a microRNA that suppresses specific target genes, preventing them from being overexpressed in male birds and ensuring the males survival. It is not required in females.

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