• SokathHisEyesOpen@lemmy.ml
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    1 year ago

    My best friend is a mirror twin. His brother cried a lot more as a baby. When they became toddlers his brother complained a lot more. Now as adults, his brother still complains and argues a lot more. I don’t understand how they can be genetically identical, have the exact same upbringing, and be so different from the moment of their birth, but they are.

      • SokathHisEyesOpen@lemmy.ml
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        1 year ago

        That’s not how identical twins are formed. An egg, fertilized from a single sperm, splits into two, creating two people with identical DNA. You’re thinking of fraternal twins, where two separate eggs are fertilized by two separate sperm.