whats the difference between fraternal and identical twins?

Question

whats the difference between fraternal and identical twins?

In: Biology

Answer 1

Fraternal twins happen when two sperm fertilize two eggs, and identical twins happen when one speed fertilizes one egg that then splits for some reason to become two zygotes.

So:
Fraternal—two eggs, different DNA
Identical—one egg, identical DNA (though it can have different epigenetic tags because nothing is straightforward)

Answer 2

Identical Twins = one sperm + one egg.

That egg, when dividing, breaks apart into two individual entities with the exact same dna.

Fraternal Twins = two sperm + two eggs.

This happens when two eggs are released at once and both are fertilized by two different sperm at the same time. They have different DNA.