Answer: Research published on January 7 in the journal Nature Genetics shows that identical twins differ by an average of 5.2 genetic mutations. ... In such studies, scientists often assume that pairs of identical twins have identical DNA, so their differences can be explained by the environments they grew up in. That's because so-called identical twins pick up genetic mutations in the womb, as their cells weave new strands of DNA and then split into more and more cells.
Step-by-step explanation: