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Mystery #2Tier 2genetics inheritance recessive

Why can a feature vanish in the parents but pop up again in the grandchildren?

Your grandmother has bright red hair. Your mum and dad both have brown. Then you are born, and there it is again, the same red as grandma's. How did it leap right over your parents?

A portrait of a woman with bright coppery red curly hair and freckled pale skin.
Photo: Wikimedia Commons contributor · CC BY 2.0 · via Wikimedia Commons

Your guess

Why do you think the feature disappeared and then came back?

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