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flag Scientists find a microRNA, not a protein gene, controls dark wing colors in butterflies and moths.

flag Scientists have discovered that a microRNA called miR-193, not the protein-coding gene 'cortex', is the key regulator of melanic wing coloration in butterflies and moths. flag This finding, published in Science, shows that disrupting miR-193 eliminates black and dark wing colors across different butterfly species. flag The discovery highlights the importance of non-coding RNAs in controlling phenotypic traits and suggests a conserved role for miR-193 across the animal kingdom.

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