There are identical twins out there whose parents confused one with the other and now they living their life with the name of the other sibling, never noticing because it doesn't make any difference.

FalscherFuchs@feddit.de to Showerthoughts@lemmy.world – 408 points –
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he was the second sperm that entered the egg

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.

wait what

Normal: 1 egg + 1 sperm make 1 person

Identical twins: 1 egg + 1 sperm make 2 person

I edited my comment with more details at the same time you were responding. Check above.

so i just read the wikipedia article and i don't udnerstand what it says. i'll stick with my missconception xD

/s obv