Identical twins are not as identical as previously assumed, according to a study published today (January 7) in Nature Genetics. Rather than having exactly the same DNA sequences, twins start ...

Although the photographs did show twins with a difference in sun exposure, a study involving the perceived age differences between identical twins ... Twin A had a body mass index 2.7 points ...

MZ twins are generally assumed to be genetically identical, although some genetic and epigenetic differences have now been described. A newly published finding that phenotypically concordant as ...