I dont think there is such a thing as paternal twins...perhaps you are thinking of fraternal twins. In that case, they are not identical twins, they do not look the same and they can be different sexes.
Fraternal twins can be the same sex or opposite sexes. It doesn't matter.
Fraternal twins are two siblings that have the same birth day, but do not look identical.
Identical twins are formed from a single egg that splits into two. Fraternal twins are formed from two separate eggs that are both separately fertilized. So identical twins have identical DNA, and fraternal twins do not.
Another name for fraternal twins is dizygotic twins.
I dont think there is such a thing as paternal twins...perhaps you are thinking of fraternal twins. In that case, they are not identical twins, they do not look the same and they can be different sexes.
Paternal Non-Identical fraternal twins
My Paternal grandfather and his sister were twins. I myself have fraternal twin boys. But none of my 1st cousins, or my sister have twins. I have two cousins who have had 3 single births so far, and my sister has had 2 single births as well. I dont know the chances of them giving birth to twins, but it does seem relatively low.
Fraternal twins can be the same sex or opposite sexes. It doesn't matter.
Fraternal twins are two siblings that have the same birth day, but do not look identical.
fraternal twins have two different chromosomes
No, it has to run on your side, as far as I have read anyway.
fraternal relates to brotherhood and paternal relates to fatherhood
Fraternal twins do not necessarily write with the same hand. Hand preference is influenced by genetics and environmental factors, so it is possible for fraternal twins to have different dominant hands.
fraternal twins have two different chromosomes
Identical twins come from the same fertilized egg; fraternal twins come from 2 fertilized eggs.
Identical twins come from the same fertilized egg; fraternal twins come from 2 fertilized eggs.