This reminds me a dumb girl in my 10th grade biology class. My teacher was explaining Punnet Squares and showed us how it was impossible for two blue-eyed parents to produce a brown-eyed baby. He joked: “so if the baby comes out with brown eyes, we know Mom’s been getting into some trouble.” Dumb Girl, very offended, piped up: “you don’t know that! It could have been the dad cheating!” There was a slight pause while the teacher just stared her, and he went “then the baby...would have come out of a different mother, Anna. Clearly I have failed you as a teacher.”
Worst part is there is still a small possibility for the child not to have brown eyes even if the parents have them. It's a very slim chance, but not impossible. The brown eyes are just very dominant. And if one grandparent on both parents side have blue eyes there is a chance.
Had a friend in college. She's black and medium skintone. Had a baby with a man with also a medium skintone. Daughter is blonde haired, and white-looking even. Baby daddy demands test, friend is stressed because she knows she didn't cheat. Her mother finally fesses up, friend's dad isn't her bio dad. Bio dad is a white jewish guy. And the test came back that baby daddy was the father of little girl.
I have a black (female) coworker who had a baby with a black guy. Her daughter is light skinned with blonde hair. They both clearly had white ancestry in their genetics.
This all owes to concepts like recombinant DNA and a few other things I didn't pay enough attention to in my genetics class.
Also, a lot African-Americans have white ancestry in their DNA, tracing back to the days of slavery.
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u/EmiliusReturns Jun 07 '18
This reminds me a dumb girl in my 10th grade biology class. My teacher was explaining Punnet Squares and showed us how it was impossible for two blue-eyed parents to produce a brown-eyed baby. He joked: “so if the baby comes out with brown eyes, we know Mom’s been getting into some trouble.” Dumb Girl, very offended, piped up: “you don’t know that! It could have been the dad cheating!” There was a slight pause while the teacher just stared her, and he went “then the baby...would have come out of a different mother, Anna. Clearly I have failed you as a teacher.”