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

When identical twins have babies are they siblings?

The offspring of two pairs of identical twins are legal cousins, but are physically more related to siblings, rendering the Salyers one wide family. As unlikely as twins marrying twins and having babies at the same time maybe, it seems like the Salyers were predestined to have their families together.

What happens when two twins have a baby?

The answer is quite simple. [Two sets of] identical twins will not have identical offspring, says Professor Rodney Scott, head of medical genetics at the University of Newcastle. The only way we get identical offspring is when a fertilised egg splits into two cells.

Do identical twins have the same blood type?

5 Monozygotic (identical) twins will have the same blood type, with a few very rare exceptions. Dizygotic (fraternal) twins may have the same blood type, or they may have different types.