No cause it comes from a single egg splitting and that egg will have the same dna (i.E boy or girl) even when its split.

Well just because the egg has the same dna,doesn't mean the sperm does right? I don't know. I could have swore that identical twins could be boy and girl.

Identical twins split from one sperm and one egg. They are more rare than fraternal twins. Identical twins do not run in families.

Fraternal twins are 2 sperm meet 2 eggs. When a woman produces 2 eggs, it is said she hyperovulates. Hyperovulation can be inherited - but the man in the relationship still has nothing to do with twins (other than his sperm being in the right place at the right time).

Identical twins share the same dna. Fraternal twins are exactly like any brother/sister in the amount of dna they share.

Oh ok,i get it now.I thought identical twins were 1 egg 2 sperm that split. Thank you guys for your help

Lmao melly belly how can a boy and a girl look exactly alike??

Ur silly lol.

Hey, just thought I would add that what you are talking about melissa does occur. When one egg splits into two and is then fertilized by two different sprem, the resulting twins are called polar body twins. In this case the twins can be different sexes, and share 75% of the same dna, as opposed to the 100% shared by identical twins.

h.A! So it can happen.I'm not crazy after all!!! I have seem a girl and boy twin look the same before.Of couse the boy looked more masculine

Lol, this reminds me of a law & order episode.

lol,why?

How can a boy and a girl be identical? One has a penis and one has a vagina...

I have seen boy and girl twins aswell.

Ive seen a boy and girl that are identical twins too!

So yes it does happen.

Actually I had two set of twin friends one was fraternal(boy/girl) and other boy girl must have been identicals I know its almost hard to believe but you couldnt tell the difference between them at 12 now at 21 jean michel has fuzz on his face and his sister doesnt but they still look identical!!

Wow thats skatty still looking alike when theyre older!

Well, the .Olsen twins are fraternal and they're hard to tell apart... Just one of those weird things that happens sometimes, I guess.

I just have to say this again...

Twins are not identical if one has a penis and the other has a vagina!

omg really?

Hha just had to be a smartas*..But just kidding..

Identical twins come from one egg fertilized by one sperm. And every sperm has either the x or the y chromosone. The fertilized egg then splits. One sperm can only carry one gender people! No identical boy and girl sets. Nope nope. How can one sperm create both genders?


As for people saying they have seen a boy and girl set of twins look the same, fraternal twins can look the same also. Just like siblings with age gaps can look strikingly simular.

Me and my brother are 4 years apart..And when we were younger everyone thought we were twins..We still kind of look alike..But not as much ..Now that we are older..Haha that was back in the day!