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Feeding mice an enriched diet during pregnancy silenced a gene for light fur in their pups. And even though these pups ate a standard, un-enriched diet, the gene remained less active in their subsequent offspring.
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Hmmm...You know, my mom was given a terrible time about my brother and mine blond hair and blue eyes (as she and dad are brown haired/brown eyed) but every one of my grandmothers great grandchildren are fair haired and I believe have light eyes too...(I don't pay as close attention to the color of eyes) I wonder if this gene/diet link works in reverse too? And what the paternal influence is?