Some identical (monozygotic) twins are not really identical. #monozygotictwins #identicaltwins #twinstudies #postgenomicmutations
"monozygotic twins differ on average by 5.2 early developmental mutations and approximately15% of monozygotic twins have a substantial number of these early developmental mutations specific to one of them."
https://www.nature.com/articles/s41588-020-00755-1.epdf