“We are in a unique position to be able to help,” said Laura Serber, who has attended with her twin, Linda, every year since they were 3 years old. (They are now 49.) The sisters are both physical therapists from Sheffield Village, Ohio. “Since our genes are 100 percent identical, it really is nature versus nurture,” Laura said.
Scientists often study how a person’s personality, behaviors and environment interact with genetics. Identical twins and multiples are perfect for those studies.