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Small-Scale Question Sunday for November 23, 2025

Do you have a dumb question that you're kind of embarrassed to ask in the main thread? Is there something you're just not sure about?

This is your opportunity to ask questions. No question too simple or too silly.

Culture war topics are accepted, and proposals for a better intro post are appreciated.

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both my grandmothers had blue eyes. So I know my parents were both carriers for blue eyes

both my grandmothers had blue eyes. So I know my parents were both carriers for blue eyes.

Maybe. Kind of. There are recessive brown eyed genes. Two blue eyed parents can possibly have brown eyed children. The examples of Mendelian genetics used in high school tend to be extremely oversimplified. They really shouldn't use these examples without a huge warning that any practical application on humans may defy what you were taught. Reality tends to be very polygenic with a lot of codominance unlike the Punnett squares we learned in school. When we learned Punnett squares in middle school in the 90s, our teacher warned us this is a huge oversimplification that only works for carefully selected traits like pea plant stalk shape and not common traits in humans.

https://www.nature.com/articles/s41433-021-01749-x.pdf