Fraternal twins are more popular.
Another name for fraternal twins is dizygotic twins.
There is no precise percentage of fraternal or identical twins but it is estimated that 2/3 of all twins are fraternal where as 1/3 of twins are identical.
Yes, fraternal twins are perfectly normal.
Fraternal twins can be the same sex or opposite sexes. It doesn't matter.
No, identical twins do, but fraternal twins come from 2 separate eggs.
They are twins!
fraternal twins have two different chromosomes
No that's why theyre called fraternal twins. Identical twins are identical (share the exact same genes) while fraternal twins are as similar to each other as normal siblings are.
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.