It's incredible but we all are learning something new 

as interracial marriage becomes more widespread.

As pointed out by one of the parents, once again 

people must realize how ridiculous the base of racism is.

Of note,

To form identical or monozygotic twins, one fertilized egg (ovum) splits and develops into two babies with exactly the same genetic information. To form fraternal or dizygotic twins, two eggs (ova) are fertilized by two sperm and produce two genetically unique children.