7 ms·

I have two sets of identical twins as parents and a twin for a girlfriend. I’m certain that you’re wrong.

• seibelj 4y ago
  Everyone becomes a geneticist when they have biological children. Even in the small talk and banter among strangers when they observe parents and children.
• tresil 4y ago
  The twin study described here may interest you: https://youtu.be/yPSRgcEpfWY https://youtu.be/yPSRgcEpfWY